Speaking+ Speaking+
Get started
usage 2 min read

when or while

When or while: choosing the right time conjunction

A closer look

If one action marks a single point, use when; if two actions overlap, use while: When the lights went out, I grabbed a torch versus While the soup simmered, I chopped onions.

  • Point at the moment one thing happens and you'll say when: When she waved, we stopped. Draw a line covering the whole stretch and you'll say while: While we waited, snow fell.

Pick your situation

  • Picture this: you're telling a friend about last night's dinner prep, and the phone rings while the sauce is simmering. You'd say While I was cooking, the phone rang. The cooking fills the background; the ring lands inside it.

  • Narrating a chain of single moments? Use when: I called her when I got home. The calling marks one point in your sequence of events, not a span of time.

  • Telling a story where one event finishes before the next begins? Use when: When the show ended, we left. The leaving follows one completed moment.

  • Describing two activities that ran side by side? Use while: While she was studying, her brother watched TV. Both actions cover the same stretch.

  • Setting a scene as background for a surprise? Use while for the ongoing part: While we were hiking, it started to rain. The rain interrupts the longer action. This pattern is common but not the only use.

  • Careful: if the 'background' action is really a quick step in your sequence, switch to when: When the kettle boiled, I poured the tea. Saying while the kettle boiled would suggest a longer stretch than you mean.

Keep reading

All articles

usage

when grammar child

You're using the word 'when' to say 'at the time that', and you want to know if your sentence needs it right now.

usage

when you when when you

A usage guide for forming one correct sentence with 'when' as a time clause, with the condition stated first and the main clause after the comma.

usage

when as an adverb

Use *when* to tie an action to the time it happens. The essential condition: *when* needs a complete sentence beside it. Write *We left when the rain stopped*; *We left when the rain stopped* works because both parts are full clauses. If your draft stops at *When the rain stopped*, it's incomplete, so add a main clause such as *We left*. ## What your sentence says When you write *when*, you're telling the reader that one action happened at the moment of another. *We left when the rain stopped* communicates that leaving and the rain stopping happened at the same point in time. If you only want to give the time without linking two events, an adverb like *yesterday* or a phrase like *at noon* usually fits better. ## Referring to the future In references to the future, the *when*-clause takes the present simple or the present perfect, not *shall* or *will*: *I'll call you when I arrive*, or *I'll call you when I've finished*. Writing *I'll call you when I will arrive* is a typical error. This applies when *when* means 'at that time' in a future reference. ## One decision-changing qualifier When *when* introduces a question instead, it stands alone as an adverb and doesn't need a second clause: *When did you arrive?* is complete by itself. If your sentence is asking for a time, you're not writing the clause-linking use above, so the complete-sentence condition doesn't apply. Pick a sentence you're working on and decide whether it's asking for a time or linking an action to a time. Which one is it? - If you're linking two events, check that both sides of *when* are complete clauses and keep future references in the present simple or present perfect. - If you're asking for a time, *when* stands alone and your sentence is already complete. Once you've decided, rewrite your sentence so it follows the matching pattern, then read it aloud to confirm it sounds natural. For more practice with time expressions, a grammar reference's section on *when* as a conjunction is the next stop.

usage

when job grammar

Use *when* in a job-related sentence when the action is tied to a real, fixed point in time, and switch to *if* when the time is uncertain or merely possible, so you write *When I start the new job, I'll update my email signature* because the start date is set, but *If we confirm Tuesday, I'll send the calendar invite* because it isn't.

usage

where as or whereas

Situational usage guide for choosing where as or whereas.

examples

how can i use although in a sentence

Although he was tired, he finished the report before dinner. Although joins two ideas. It can show that the second idea is surprising after the first, as here: tiredness would make the report less likely, yet he finished it. It can also work like *but*, simply adding a true statement or preference after the first idea, as in *I enjoyed the meal, although the soup was too salty*.