when

adverb, conjunction

UK /wen/

When can be used in the following ways:

as a conjunction (connecting two clauses): When he saw me, he waved.

as a question adverb (introducing a direct or indirect question): When shall we meet?Do you know when these houses were built?

as a relative adverb (referring back to a noun and introducing a relative clause): I remember the day when the war began. (introducing a clause that is the subject, object, or complement of another clause): My proudest moment was when I received the poetry prize.

1
at what time or in what situation
1. 1a
  used for asking at what time something happens
  When will we know our test results?
  When did the trouble start?
  I asked him when he was going to start work.
  ‘You’ll get your money back.’ ‘Yes, but when?’
  since when:
  Since when have you been in charge of the project?
  Synonyms and related words
  Ways of asking questions and making requests
  after you
  any chance of...?
  any luck?
2. 1b
  used for asking in what kind of situation something happens
  When should I end a letter with ‘Yours sincerely’?
  When is it OK to hug someone that you’ve just met?
  Synonyms and related words
  Ways of asking questions and making requests
  after you
  any chance of...?
  any luck?
3. 1c
  used when someone knows or says at what time something happens, or in what situation it happens
  He didn’t say when they would leave.
  It is important to know when you have had enough to drink.
  Synonyms and related words
  General words referring to time
  then
  all
  last
2
at the time that something else happens
1. 2a
  as soon as another action or event has finished
  When it stops raining, I’ll show you the garden.
  Synonyms and related words
  After another event or time
  after
  following
  since
2. 2b
  at the same time as something else
  I always wear a hat when I work in the garden.
  when doing something:
  She was often nervous when facing the camera.
  Synonyms and related words
  Happening or done at the same time
  when
  while
  simultaneous
3. 2c
  at a point during the time that something else is happening
  She claims she was at a friend’s house when the shooting took place.
  Synonyms and related words
  General words referring to time
  then
  all
  last
3
used for talking about a particular time or situation
The biggest surprise for Josie was when she was chosen as team captain.
the time/day/year etc when:
Do you remember the time when we took your mother camping?
There are some days when everything seems to go wrong.
Synonyms and related words
General words referring to time
then
all
last
Usage note
When can be left out or replaced by ‘that’ when it follows a noun and introduces a relative clause: I remember the day (that) we first met.
4
used for introducing a situation that makes someone’s action or behaviour seem surprising
Why does she always drive to work when she could easily take the train?
He went on protesting his innocence when he was obviously guilty.
5
used for making a general statement about something that is always true or correct
We use ‘an’ when the next word begins with a vowel.
Tonic water makes a refreshing drink when served with ice and lemon.

单词	when
释义	when adverb, conjunction UK /wen/ Other entries for this word say when phrase since when? phrase time was (when) phrase if/when in doubt phrase when you’re ready phrase when the time comes phrase when the chips are down phrase when the mood takes you phrase when your ship comes in phrase when someone’s back is turned phrase what/where/when etc exactly phrase like/hate/love etc it when phrase if/when the occasion arises phrase when all is said and done phrase if/when the balloon goes up phrase kick someone when they are down phrase hit/kick a man when he’s down phrase what/where/when do you think? phrase I’ll believe it/that when I see it phrase what/how/when etc do you expect...? phrase more dictionary definitions DEFINITIONS5 When can be used in the following ways: as a conjunction (connecting two clauses): When he saw me, he waved. as a question adverb (introducing a direct or indirect question): When shall we meet?Do you know when these houses were built? as a relative adverb (referring back to a noun and introducing a relative clause): I remember the day when the war began. (introducing a clause that is the subject, object, or complement of another clause): My proudest moment was when I received the poetry prize. 1 at what time or in what situation 1a used for asking at what time something happens When will we know our test results? When did the trouble start? I asked him when he was going to start work. ‘You’ll get your money back.’ ‘Yes, but when?’ since when: Since when have you been in charge of the project? Synonyms and related words Ways of asking questions and making requests after you any chance of...? any luck? 1b used for asking in what kind of situation something happens When should I end a letter with ‘Yours sincerely’? When is it OK to hug someone that you’ve just met? Synonyms and related words Ways of asking questions and making requests after you any chance of...? any luck? 1c used when someone knows or says at what time something happens, or in what situation it happens He didn’t say when they would leave. It is important to know when you have had enough to drink. Synonyms and related words General words referring to time then all last 2 at the time that something else happens 2a as soon as another action or event has finished When it stops raining, I’ll show you the garden. Synonyms and related words After another event or time after following since 2b at the same time as something else I always wear a hat when I work in the garden. when doing something: She was often nervous when facing the camera. Synonyms and related words Happening or done at the same time when while simultaneous 2c at a point during the time that something else is happening She claims she was at a friend’s house when the shooting took place. Synonyms and related words General words referring to time then all last 3 used for talking about a particular time or situation The biggest surprise for Josie was when she was chosen as team captain. the time/day/year etc when: Do you remember the time when we took your mother camping? There are some days when everything seems to go wrong. Synonyms and related words General words referring to time then all last Usage note When can be left out or replaced by ‘that’ when it follows a noun and introduces a relative clause: I remember the day (that) we first met. 4 used for introducing a situation that makes someone’s action or behaviour seem surprising Why does she always drive to work when she could easily take the train? He went on protesting his innocence when he was obviously guilty. 5 used for making a general statement about something that is always true or correct We use ‘an’ when the next word begins with a vowel. Tonic water makes a refreshing drink when served with ice and lemon. when adverb, conjunction US /wen/US /hwen/ Other entries for this word say when phrase since when? phrase when pigs fly phrase time was (when) phrase if/when in doubt phrase when you’re ready phrase when the time comes phrase when it rains it pours phrase when the chips are down phrase when the mood strikes you phrase when your ship comes in phrase when someone’s back is turned phrase what/where/when etc. exactly phrase if/when the occasion arises phrase when all is said and done phrase if/when the balloon goes up phrase like/hate/love etc. it when phrase kick someone when they are down phrase hit/kick a man when he’s down phrase what/where/when do you think? phrase more dictionary definitions DEFINITIONS5 When can be used in the following ways: as a conjunction (connecting two clauses): When he saw me, he waved. as a question adverb (introducing a direct or indirect question): When should we meet?Do you know when these houses were built? as a relative adverb (referring back to a noun and introducing a relative clause): I remember the day when the war began. (introducing a clause that is the subject, object, or complement of another clause): My proudest moment was when I received the poetry prize. 1 at what time or in what situation 1a used for asking at what time something happens When will we know our test results? When did the trouble start? I asked him when he was going to start work. “You’ll get your money back.” “Yes, but when?” since when: Since when have you been in charge of the project? Synonyms and related words Ways of asking questions and making requests any chance of...? any luck? any requests? 1b used for asking in what kind of situation something happens When should I end a letter with “Sincerely yours?” When is it OK to hug someone that you’ve just met? Synonyms and related words Ways of asking questions and making requests any chance of...? any luck? any requests? 1c used when someone knows or says at what time something happens, or in what situation it happens He didn’t say when they would leave. It is important to know when you have had enough to drink. Synonyms and related words General words referring to time then all last 2 at the time that something else happens 2a as soon as another action or event has finished When it stops raining, I’ll show you the garden. Synonyms and related words After another event or time after following since 2b at the same time as something else I always wear a hat when I work in the garden. when doing something: She was often nervous when facing the camera. Synonyms and related words Happening or done at the same time when while simultaneous 2c at a point during the time that something else is happening She claims she was at a friend’s house when the shooting took place. Synonyms and related words General words referring to time then all last 3 used for talking about a particular time or situation The biggest surprise for Josie was when she was chosen as team captain. the time/day/year etc. when: Do you remember the time when we took your mother camping? There are some days when everything seems to go wrong. Synonyms and related words General words referring to time then all last Usage note When can be left out or replaced by “that” when it follows a noun and introduces a relative clause: I remember the day (that) we first met. 4 used for introducing a situation that makes someone’s action or behavior seem surprising He went on protesting his innocence when he was obviously guilty. Why does she always drive to work when she could easily take the subway? 5 used for making a general statement about something that is always true or correct We use “an” when the next word begins with a vowel. Tonic water makes a refreshing drink when served with ice and lemon.
随便看	snapdragon snap election snap fastener snap-on snap out of it snapper snapping turtle snappy snapshot snap to attention snap to it snap up snap/click your fingers snare snare drum snarf snarf down snark snarky snarl snarl up snarl-up snatch snatch something from someone’s grasp snatch squad

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