1. The condition is in the present form, and the result is in the future
The First Conditional connects a possible future condition with its future result. The if-clause answers the question “under what condition?”, and the main clause says what will happen then.
The Present Simple form after if does not mean that the event happens regularly or right now. The future meaning comes from the whole context and words such as tomorrow, tonight, or next week.
If + Present Simple, subject + will + V1.
- 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.
- V1 / base form —
- The base verb without to: work, go, be.
If the bus arrives on time, we will reach the office before nine.
If the bus arrives on time, we will reach the office before nine.
Arrives is in the Present Simple, but the condition concerns a future journey; will reach names the result.
If I finish the report tonight, I will send it before breakfast.
If I finish the report tonight, I will send it before breakfast.
Tonight sets a future condition, and will send shows the next action.
2. Use the ordinary Present Simple after if
In a target future condition, use the Present Simple after if: I/you/we/they + V1, and add -s or -es with he/she/it. With be, use am, is, or are.
In a neutral prediction, do not move will into the if-clause: say If it rains tomorrow, not If it will rain tomorrow. This rule applies to the basic pattern; it is not a ban on will after if in every possible English construction.
If Maya finishes early, she will join us for dinner.
If Maya finishes early, she will join us for dinner.
The subject Maya requires finishes with -es; the future result has will join.
If the room is free tomorrow, we will hold the meeting there.
If the room is free tomorrow, we will hold the meeting there.
After if, use is, even though the condition refers to a future state.
3. In the result, use will + the base form
In the main clause of the basic pattern, use will, followed by V1 without to, -s, or a past form. Will does not change with he, she, or it: she will call, the shop will close.
The contraction 'll is natural in conversation and does not change the structure: I'll call = I will call. In controlled gap-fill tasks, read carefully to see whether you need to enter will together with the verb or only the verb itself.
will + V1: will call, will go, will be; not will calls / will went / will to go
- V1 / base form —
- The base verb without to: work, go, be.
If Ben finds the address, he will message us.
If Ben finds the address, he will message us.
Finds has -s in the condition; after will, the unchanged form message is used.
I will take a taxi if the last train leaves early.
I will take a taxi if the last train leaves early.
Will take is the result; leaves is the Present Simple after if.
4. The negative can be in either clause
Form a negative condition with do not / don't or does not / doesn't + V1: if I don't finish, if she doesn't call. Do not add -s to the main verb after doesn't. With be, add not without do: if the room isn’t free.
A negative result has will not / won't + V1. The position of the negative changes the fact: If he doesn't call, I will leave negates the condition; If he calls, I won't leave negates the result.
If + subject + don't/doesn't + V1, subject + will/won't + V1.
- 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.
- V1 / base form —
- The base verb without to: work, go, be.
If the delivery doesn't arrive by Friday, I will contact the shop.
If the delivery doesn't arrive by Friday, I will contact the shop.
Doesn't arrive is a negative condition; will contact is an affirmative result.
We won't walk home if it rains after the concert.
We won't walk home if it rains after the concert.
Won't negates the future result; rains remains in the Present Simple.
5. The clauses can change places
The if-clause can come first or second. The meaning and verb forms do not change when the clauses are reordered: If the door is locked, I'll call you = I'll call you if the door is locked.
When the if-clause comes first, separate it with a comma in ordinary writing. When it comes after the main clause, there is usually no comma before if. In short sentences, actual punctuation sometimes varies, but the exercises in this lesson practice the neutral basic pattern.
If the café is full, we will eat at home.
If the café is full, we will eat at home.
The if-clause comes first, so a comma is needed after full.
We will eat at home if the café is full.
We will eat at home if the café is full.
The main clause comes first; in neutral writing, no comma is needed before if.
6. Build questions in the main clause
In a yes/no question, will comes before the subject of the main clause: Will you call me if you are late? In a wh-question, put what, where, when, or another question word before will.
After if, keep normal word order and the Present Simple: if the shop is closed, not if is the shop closed. If the if-clause comes first, the question in the main clause still has inversion: If the train is late, will you wait?
What + will + subject + V1 + if + subject + Present Simple?
- 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.
- V1 / base form —
- The base verb without to: work, go, be.
Will you text me if you miss the bus?
Will you text me if you miss the bus?
Will comes before you in the main question; after if, we have you miss.
What will Anna do if the office is closed?
What will Anna do if the office is closed?
Question word what + will Anna do; the if-clause has normal order: the office is.
7. The limits of the basic pattern and carrying it into speech
This lesson practices the narrow form if + Present Simple, will + V1. In English, the main clause of a conditional sentence can contain can, may, might, should, or an imperative, but these are not hidden-key variants in exercises that explicitly specify will.
Will sometimes occurs after if with the meaning of willingness, a polite request, or a later result. Such constructions do not disprove the basic pattern, but they are outside the scope of this A2 lesson. This lesson also does not study in detail the functions of promises, warnings, or suggestions, unless, or the contrast among all types of conditional sentences.
Before writing your own answer, check: are there two complete clauses; is the Present Simple after if; is V1 after will; and do the negative, order, and comma match your meaning? You can use your own or invented safe situations.
If you need a quiet room tomorrow, I will book one today.
If you need a quiet room tomorrow, I will book one today.
The two time points do not change the framework: need comes after if, and will book is in the result.
If you need help, call me.
If you need help, call me.
This is a grammatical conditional construction with an imperative, but it is not this lesson’s target will + V1 pattern.
Common mistakes
Incorrect:If the meeting will finish early, I will call you.
Correct:If the meeting finishes early, I will call you.
In a neutral future condition, use the Present Simple after if: finishes, not will finish.
Incorrect:If Leo misses the bus, he will walks home.
Correct:If Leo misses the bus, he will walk home.
After will, use the base form walk without -s.
Incorrect:If she doesn't charges her phone, it will stop working.
Correct:If she doesn't charge her phone, it will stop working.
After doesn't, the main verb has the form charge without -s.
Incorrect:If they arrive late, we won't waited for them.
Correct:If they arrive late, we won't wait for them.
Won't, like will, requires the base form wait, not waited.
Incorrect:What you will do if the shop is closed?
Correct:What will you do if the shop is closed?
In a wh-question in the main clause, will comes before the subject you.