During For While Compare Exercises

During + noun phrase

During is a preposition. It is followed by a noun, not a clause. It means "at some point within a period" — it tells us when something happened, not how long.

ExampleNote
She fell asleep during the film.at some point while the film was on
He worked as a waiter during the summer.at some point in that summer
There was a power cut during the night.at some point during the night

For + duration

For answers "how long?" It is followed by a quantity of time. It tells us the length of a period.

ExampleNote
I studied for three hours.duration of studying
She's been working here for five years.with perfect tenses (from past to now)
We waited for a long time.indefinite duration
for vs since: Use for + duration: "for three years" / "for a week". Use since + point in time: "since 2020" / "since Monday". Both go with perfect tenses.

While + clause

While is a conjunction. It is followed by a subject + verb. It shows that two actions were happening at the same time.

ExampleNote
The phone rang while I was cooking.two simultaneous actions (past continuous typical)
While she was sleeping, he left.time clause first — use comma
I listen to music while I work.present — habitual simultaneous actions

Compare during / for / while

WordFollowed byAnswers
duringnoun / noun phrase"when?" (within a period)
forquantity of time (three hours, a week)"how long?"
whilesubject + verb (full clause)"at the same time as" (what else was happening)
"She read during the flight." (when — within the flight)
"She read for two hours." (how long)
"She read while the baby slept." (simultaneously)

Exercises

Choose the correct word.

1. I fell asleep ___ the lecture. (at some point within the lecture)

2. She lived in Paris ___ six months. (how long)

3. I saw an accident ___ I was driving to work. (simultaneous action)

4. The company grew a lot ___ the economic boom.

5. We've been friends ___ over twenty years.

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