1. Intuition: the slot rather than individual words
English articles are not used in some languages, so learners may look for a separate rule for each word. It is easier to remember four slots where no article appears: a meal, transport after by, a day or month, and next or last with a time unit. Learn them as complete units, together with the preposition and verb.
A slot answers a question about a general category, not a specific thing. When do you eat? This is not about one particular dinner, but about dinner as part of the day. How do you travel? This is not about one particular bus, but about a means of transport. That is why the and a are unnecessary here.
The rule depends on habit: you need to recognize this list at a glance rather than work it out from scratch each time.
have + meal | by + transport | on + day, in + month | next / last + time
Do you want to have lunch with us?
Do you want to have lunch with us?
Meal in use, with no article.
They came by tram.
They came by tram.
By + means of transport, with no article.
The shop opens on Saturday.
The shop opens on Saturday.
Day of the week with on, with no article.
We moved house last spring.
We moved house last spring.
Last + season, with no preposition or article.
2. Meals
The names breakfast, lunch, dinner, supper, and brunch are used without an article in ordinary usage: have, eat, cook, skip, make, order dinner. The same applies after prepositions: for lunch, after dinner, before breakfast, at supper.
When we single out one particular meal, a/an or the is possible: a quick lunch, an early breakfast, The dinner was excellent. An adjective often accompanies this specification, but it does not automatically switch on an article: customary meals can also have modifiers.
The word meal is not the name of a particular meal; it is an ordinary noun, so it is used with an article: a meal, the meal.
have / skip / cook + breakfast | lunch | dinner
I never skip lunch on busy days.
I never skip lunch on busy days.
A habitual action, so there is no article.
What did you have for supper?
What did you have for supper?
For + meal, with no article.
He made a huge brunch for the whole family.
He made a huge brunch for the whole family.
The adjective huge brings back a.
The lunch at the conference was very good.
The lunch at the conference was very good.
A specific lunch known to the listener, so the is used.
3. Transport after by
After by, a means of transport is used without an article, without a possessive word, and without a: by bus, by car, by train, by plane, by bike, by taxi, by tram, by metro, by ferry, by boat. In general, we also say by air, by sea, by road.
On foot is the English expression for walking. In this meaning, foot does not follow by, and there is no article either.
The slot by + transport answers the question “how?”. When we say where someone is or what someone is doing inside a vehicle, we use a different construction: on the bus, in a taxi, in my car. Here the vehicle is specific, so an article or possessive word is present. Other verbs work the same way: take the bus, catch a train, miss the tram.
Both patterns are natural when talking about a journey: He gets to the office by bus and He takes the bus to the office. The only error is mixing them to produce by the bus.
by + transport (without the, a, my) | on foot
We crossed the border by coach.
We crossed the border by coach.
A means of travel, with no article.
Many students cycle, but some come by metro.
Many students cycle, but some come by metro.
By metro, with no article.
Mia read a book on the train.
Mia read a book on the train.
A specific train as a place, so on the is used.
My neighbour walks to the market on foot.
My neighbour walks to the market on foot.
On foot is a fixed expression.
4. Days and months
Days of the week answer the question “when?” with the preposition on and no article: on Monday, on Fridays. In the plural, this slot expresses regularity: on Mondays, every Friday. In conversation, especially in American English, on can be omitted: See you Monday.
Months are used with in and no article: in June, in October. For a date with a number, on is appropriate: on the fifth of June.
A day name can be combined with a part of the day, and there is still no article: on Monday morning, on Friday evening. Individual parts of the day have their own rules: in the morning, in the afternoon, in the evening with the article the, but at night without it. Learn these slots separately.
on + day | in + month | on + day + part of the day
The gallery is free on Sundays.
The gallery is free on Sundays.
The plural day name indicates regularity.
It usually snows in January.
It usually snows in January.
In + month, with no article.
Her flight lands on Wednesday evening.
Her flight lands on Wednesday evening.
The day and part of the day appear together, with no the.
The baker starts work early in the morning.
The baker starts work early in the morning.
Exception: this slot contains the.
5. next and last with a time unit
As independent time expressions, next week, last month, next summer, last Friday, and last night do not need in/on/at or an article. The reference point is usually the moment of speaking. Other prepositions can have their own required meaning: until next week, since last Friday.
These expressions do not need in or on before them. Errors such as in next week and on last Friday result from transferring a preposition from another language.
The construction with the changes the meaning. The next day and the next week mean the day or week that came after a point already mentioned in the story. The last week of May means the final week of May. Therefore, the next day fits a story in the past, while next week refers to a plan from today.
The same applies to this morning and every Sunday: in an ordinary time expression, we do not add in/on/at. However, a different meaning may require a preposition: by this evening, until next Sunday. This is not a ban on all prepositions before these words.
next | last | this | every + time unit (without in, on, the)
The exhibition opens next April.
The exhibition opens next April.
Next + month, with no preposition.
I didn't sleep well last night.
I didn't sleep well last night.
Last night is a fixed slot.
We reached the hotel at noon; the next morning we climbed a hill.
We reached the hotel at noon; the next morning we climbed a hill.
The reference point is the named point in the past, so the is used.
Every Sunday my aunt bakes bread.
Every Sunday my aunt bakes bread.
Every + day, with no on or the.
6. The boundaries of the rule: when the article returns
Compare the fixed expressions with other noun groups: have lunch / have a long lunch; go by bus / sit on the bus; next day in the appropriate context / the next day; at night / in the evening. The article is determined by the whole construction, not just one word.
These cases do not contradict the rule; they define its boundaries. If the question is “how?” or “when in general?”, we have a slot without an article. If the question is “which one?” or “where inside it?”, an article is needed.
This material does not cover institutions (go to school, be in hospital) or general uses of the with unique or specific objects (the sun, the best). These are separate rules in the same section.
We had a late lunch and then a long walk.
We had a late lunch and then a long walk.
The adjective late brings back a.
I left my bag in a taxi.
I left my bag in a taxi.
A particular vehicle, used as a location rather than as a means of travel.
On Sunday I met Tim; the next day he flew to Oslo.
On Sunday I met Tim; the next day he flew to Oslo.
The reference point is the Sunday already mentioned.
The kids play outside in the afternoon.
The kids play outside in the afternoon.
A part of the day with the.
7. From the rule to speaking
It is best to learn each slot as a fixed block: have breakfast, go by train, on Thursday, next year. The learner recalls the whole block, so the question of the article does not arise.
For self-checking, ask yourself three questions. Is this a habitual action or a single event? Is this a means of transport or a specific vehicle? Is the reference point today or a point already named in the story? The answers indicate whether an article is needed.
In your own speech, you can avoid the slot by using another natural construction: take the bus instead of go by bus, walk instead of on foot. This is not an error, but in exercises that require you to “use by,” the slot itself is needed.
Our cousins always arrive by ferry in July.
Our cousins always arrive by ferry in July.
Two article-free slots in one sentence.
I'm having brunch with Ola next Sunday.
I'm having brunch with Ola next Sunday.
A meal and next + day, both without articles.
Common mistakes
Incorrect:My uncle always travels to Odesa by the train.
Correct:My uncle always travels to Odesa by train.
After by, the name of the transport is used without an article because it refers to a means of transport.
Incorrect:Do you usually have the breakfast at home?
Correct:Do you usually have breakfast at home?
A customary meal is named without an article.
Incorrect:The meeting is on next Thursday.
Correct:The meeting is next Thursday.
No preposition is needed before next.
Incorrect:I visited my grandparents in last summer.
Correct:I visited my grandparents last summer.
Last + season is used without a preposition.
Incorrect:The kids went to the park by foot.
Correct:The kids went to the park on foot.
The English expression is on foot, not by foot.
Incorrect:My birthday is in the March.
Correct:My birthday is in March.
The name of a month is used without an article.
Incorrect:Our first lesson is in Wednesday.
Correct:Our first lesson is on Wednesday.
We use on with days of the week, not in.
Incorrect:I always read a book at the night.
Correct:I always read a book at night.
The slot at night does not take an article.
Incorrect:We came back by our car.
Correct:We came back by car.
There is no possessive word after by: by car or in our car.