1. The trigger for the bare form is not only a verb
English has a special verb form for the meaning “this is required,” rather than “this is the case.” It coincides with the bare stem: submit, remain, be, have. In this rule, what matters is WHAT triggers it: an adjective expressing necessity or a noun expressing necessity, not a verb of command.
There are two patterns. First: it + be + adjective (essential, vital, important, necessary) + that + subject + bare form. Second: noun (recommendation, requirement, suggestion, insistence, condition) + that + subject + bare form; the noun itself may be the subject, object, or part of the predicate.
The shared meaning is clear: both triggers communicate not a fact, but what the circumstances require. That is why the verb in the that-clause does not receive a personal ending—it does not describe an event as a fact, but presents it as necessary.
It + be + essential/vital/important/necessary + that + subject + bare form · noun (recommendation/requirement/suggestion) + that + subject + bare form
- subject / S —
- The grammatical subject: who or what the clause is about; the verb agrees with it. In The book was written, the book is the subject, although someone else does the action.
- noun —
- A word naming a person, thing or idea: student, book, happiness.
It is essential that the duty pharmacist verify every prescription before it is dispensed.
It is essential that the duty pharmacist verify every prescription before it is dispensed.
The subject the duty pharmacist is third-person singular, but verify appears without -s: after essential that, the clause expresses what is required, not a fact.
The recommendation that the ferry timetable be published a month in advance came from the harbour board.
The recommendation that the ferry timetable be published a month in advance came from the harbour board.
Here the trigger is the noun recommendation; the that-clause states the content of the recommendation itself, while the main predicate came appears later.
It is necessary that the census form have a clear signature line.
It is necessary that the census form have a clear signature line.
Have, not has: the bare form does not depend on the subject being singular.
2. Form: four things that change and one that does not
First: a lexical verb loses -s in the third-person singular. Second: be remains be and does not change to am/is/are. Third: the passive is formed as be + the past participle, without is/are before it. Fourth: negation is simply not before the bare form, without do, does, or did.
The word order does not change: after that comes the usual direct order, “subject + verb.” There is no inversion here, and there is no to before the verb either: the conjunction that already introduces a subordinate clause with its own subject.
As a result, the difference is not visible in many sentences: if the subject is I, you, we, they, or plural, the bare form is identical to the ordinary form. So you can check yourself reliably with the third-person singular and with the verb be.
bare form · be (not is/are) · be + past participle for the passive · not + bare form for negation
- V3 / past participle —
- The third verb form: worked, gone, seen. Used after have/has or in the passive, for example; it is not always the same as V2.
It is vital that the orchestra be seated before the doors open.
It is vital that the orchestra be seated before the doors open.
Passive: be seated, not is seated. The main clause is in the present, but this does not affect the form in the that-clause.
The suggestion that the choir not perform outdoors came from the conductor.
The suggestion that the choir not perform outdoors came from the conductor.
Negation is not perform. The form does not perform is not used here because the bare form does not take the auxiliary do.
It is important that we submit the translation by Friday.
It is important that we submit the translation by Friday.
With the subject we, submit is identical to the Present Simple form. For a clearer comparison, replace we with he: in this pattern, it is still submit without -s.
3. The adjective pattern: it + be + adjective + that
The most common version of the rule uses it as a dummy subject: It is essential that…, It is vital that…, It is important that…, It is necessary that…. The same group also includes imperative, crucial, and advisable; the logic is the same—they evaluate an action as necessary, not as an established fact.
This pattern has a natural synonym with a to-infinitive: It is essential for + person + to + verb. It expresses the same requirement, but it does not contain a that-clause, so there is no bare form there either. Both versions are correct; choose one rather than combining them into the hybrid that + to.
The adjective can also appear after another evaluative subject: What is essential is that…. The pattern is longer, but the trigger and the form are the same.
It is imperative that the planning committee publish its minutes within ten days.
It is imperative that the planning committee publish its minutes within ten days.
Publish without -s. Imperative belongs to the same group of adjectives expressing necessity as essential.
It is essential for the planning committee to publish its minutes within ten days.
It is essential for the planning committee to publish its minutes within ten days.
The same meaning without a that-clause: after for + person comes to publish. The bare form is not involved here—this is a different pattern.
What is necessary is that the ward rota be agreed before the holiday.
What is necessary is that the ward rota be agreed before the holiday.
The adjective appears farther from the beginning of the sentence, but the trigger is the same, and the passive remains be agreed.
4. The noun pattern: the that-clause reveals the noun’s content
The nouns recommendation, requirement, suggestion, insistence, and condition name what is required. A that-clause after them does not describe the noun; it reveals its content: “what exactly is required.” That is why the verb in it appears in the bare form.
Syntactically, this is the most difficult part of the rule: an entire clause comes between the noun and the main predicate, so it is easy to make the predicate agree with the wrong word. The main verb agrees with the trigger noun, not with the subject of the that-clause: The requirement that all trainees… was withdrawn.
In Our recommendation is that… and Their condition was that…, the noun is the subject of the main clause, and the that-clause after be reveals its content. The mandative subjunctive in this subordinate clause has the same basic form.
The requirement that each trainee shadow a senior nurse for a week was added to the induction plan.
The requirement that each trainee shadow a senior nurse for a week was added to the induction plan.
Shadow without -s in the that-clause; the main predicate was added agrees with the singular requirement, not with trainee.
Our condition was that the archive photographs not appear online.
Our condition was that the archive photographs not appear online.
Our condition is the subject of the main clause; the that-clause after was explains the condition, and its negation is not appear.
The insistence of the publisher that the index be reset in a larger type delayed the print run.
The insistence of the publisher that the index be reset in a larger type delayed the print run.
There is an of the publisher phrase between the trigger and the that-clause. The subject of the main clause is the entire group The insistence …; delayed has the same form in the singular and plural, so its ending does not show the agreement here.
5. The tense of the main clause does not affect the form
The bare form has no tense. Therefore, it does not “shift” into the past along with the main clause: after It was essential that… or The requirement that… was dropped, the verb in the that-clause remains bare.
A future meaning does not by itself add will to the mandative subjunctive: It is vital that the ferry leave on time. The time of the action is established by the context. For the target pattern, choose the base form; other types of that-clauses may contain will.
To construct the mandative subjunctive specifically, check the directive meaning of the adjective or noun and use the base form of the verb. The main predicate has its own tense, while time expressions clarify when the action is required.
It was essential that the harbour master keep a second copy of the log.
It was essential that the harbour master keep a second copy of the log.
The main clause is in the past (was), but keep remains the bare form, without -s and without kept.
The suggestion that the ferry run twice a day was dropped last winter.
The suggestion that the ferry run twice a day was dropped last winter.
Was dropped is the past tense of the main predicate; run does not change.
It is necessary that the replacement crew arrive before the tide turns.
It is necessary that the replacement crew arrive before the tide turns.
The meaning is future, but will is not used here: the bare form arrive already conveys the requirement.
6. The limits of the rule: when the bare form is not needed
Not every adjective in the it + be + adjective + that pattern triggers the bare form. Adjectives of fact and probability—obvious, clear, true, likely, unlikely, surprising—report on what is already the case or may be the case, and they are followed by the ordinary indicative form: It is obvious that the ferry leaves at six.
Not every that-clause after a noun reveals its content. Compare two sentences with the same noun: in The suggestion that the porter made was ignored, the clause is restrictive (identifying which suggestion), and the form is ordinary; in The suggestion that the porter lock the gate was ignored, the clause is content-oriented (what the suggestion was), and the form is bare.
The noun suggestion has another trap: it means both “a proposal to act” and “an assumption about a fact.” In the latter meaning, the that-clause conveys an assumption that is not necessarily true, so the verb is in the ordinary form corresponding to the tense.
Finally, in British English, there are other ways to express the same requirement alongside the bare form. That is a separate topic for a different rule; here, we are intentionally practicing the bare form, and this goal is explicitly stated in every exercise.
It is obvious that the night ferry leaves before the last train arrives.
It is obvious that the night ferry leaves before the last train arrives.
Obvious evaluates a fact, not a requirement, so leaves keeps -s. The bare form would be an error here.
The requirement that the auditors described applies only to listed companies.
The requirement that the auditors described applies only to listed companies.
Here that is the object of described: the auditors described the requirement. Described conveys the past tense; in a present context, describe is possible. This is a relative clause, not a mandative one.
The suggestion that the porter had already left surprised the manager.
The suggestion that the porter had already left surprised the manager.
Here suggestion means “an assumption about a fact,” so had already left is used. The bare form only appears when suggestion means a proposal to act.
7. Where it is actually needed and how not to spoil the rest of the sentence
The construction is particularly useful in formal writing: regulations, protocols, official letters, and recommendations. It also appears in speech, especially in American English: It’s important that he be there. Other natural ways to express necessity are have to, need to, or should.
Check the main clause, too. If its subject is a noun phrase like The requirement that…, make sure the main predicate agrees with requirement. Keep the that-clause's own subject. The imperative mood is also possible in documents, but then the text addresses the reader directly.
A useful self-check before sending a text: find the trigger, find the subject of the that-clause, put the verb in the bare form, and then separately check the main predicate. If the subject of the that-clause is I, we, they, or plural, intentionally check one more sentence with the third-person singular: that is where the error becomes visible.
It is important that the reading room stay open until eight on Thursdays.
It is important that the reading room stay open until eight on Thursdays.
The document's wording: the requirement is described, not ordered. Stay without -s.
The condition that every reader leave bags in the lockers is printed on the ticket.
The condition that every reader leave bags in the lockers is printed on the ticket.
The main predicate is printed agrees with condition; leave in the that-clause is the bare form.
Please leave your bag in the locker.
Please leave your bag in the locker.
The same meaning in a conversational register is the imperative mood. This is not a version of this rule, but a different way of communicating with the reader.
Common mistakes
Incorrect:It is essential that the auditor to review each invoice.
Correct:It is essential that the auditor review each invoice.
After that comes a subordinate clause with its own subject and verb, not an infinitive. The to-infinitive belongs to a different pattern: It is essential for the auditor to review each invoice.
Incorrect:The recommendation that the two departments be merged were published in June.
Correct:The recommendation that the two departments be merged was published in June.
The main predicate agrees with the trigger noun recommendation (singular), not with the subject of the that-clause departments.
Incorrect:It is essential that the file be encrypt before it leaves the office.
Correct:It is essential that the file be encrypted before it leaves the office.
The passive in the bare form is be + the past participle. After be, you need encrypted, not the bare stem encrypt.
Incorrect:It is essential that every applicant not to disclose the salary offer.
Correct:It is essential that every applicant not disclose the salary offer.
Negation in this clause is not immediately before the bare form; neither to nor does is used here.
Incorrect:It is vital that the backup will runs every night.
Correct:It is vital that the backup run every night.
After will, you need run without -s. For the target mandative subjunctive, we write run without will; indicative variants are a different model.
Incorrect:It is obvious that the deadline be unrealistic.
Correct:It is obvious that the deadline is unrealistic.
Obvious evaluates a fact, not a requirement, and does not trigger the bare form. An ordinary indicative form is is required here.