During, For, While — Explanation

Practice B1 grammar with exercises on during, for, and while. Learn usage, differences, and common mistakes with clear explanations and examples.

During, For, While: What’s the Difference? Exercises

People use during, for, and while to talk about time, but they mean different things. A lot of students mix them up because they all talk about time, but their grammar and meaning are different. This explanation will help you know when to use each one correctly.

Using during

During means that something happens at some point in a certain amount of time.

A noun, not a verb, comes after during.

Structure
during + noun

Examples

• I fell asleep during the movie.
• She met a lot of people during her trip.
• There was a power cut during the night.

Important note: We don't use during before a clause.
Incorrect: during I was on holiday
Correct: during my holiday

Using for

We use "for" to talk about how long something lasts or how long it takes.
It tells you how long something will last.

There is a period of time after for.

Structure
for + period of time

Examples

• They stayed in Paris for three days.
• I have worked here for a long time.
• He talked for two hours.

The main point is that "for" focuses on how long, not when.

Using while

We use while to say that two things happen at the same time.

A subject and a verb (a clause) come after while.

Structure
while + subject + verb

Examples

• I was listening to music while I was studying.
• She burned the food while she was talking on the phone.
• He called me while I was driving.

Important note: cannot be followed by a noun by itself.

Incorrect: while the movie
Correct: while the movie was playing

Things to avoid doing wrong

Incorrect: I slept during two hours.
Correct: I slept for two hours.

Incorrect: She met him while the meeting.
Correct: She met him during the meeting.

Incorrect: I read a book during I was waiting.
Correct: I read a book while I was waiting.

A quick comparison

• during → noun (within a time frame)
• for → length of time (how long)
• while → clause (two things happening at once)

If you're not sure which word to use, look at what comes after it:

• noun → during
• length of time → for
• subject + verb = while