| 单词 | when |
| 释义 | when /hwen, wen/; unstressed /hweuhn, weuhn/, adv. 1. at what time or period? how long ago? how soon?: When are they to arrive? When did the Roman Empire exist? 2. under what circumstances? upon what occasion?: When is a letter of condolence in order? When did you ever see such a crowd? conj. 3. at what time: to know when to be silent. 4. at the time or in the event that: when we were young; when the noise stops. 5. at any time; whenever: He is impatient when he is kept waiting. 6. upon or after which; and then: We had just fallen asleep when the bell rang. 7. while on the contrary; considering that; whereas: Why are you here when you should be in school? pron. 8. what time: Till when is the store open? 9. which time: They left on Monday, since when we have heard nothing. n. 10. the time of anything: the when and the where of an act. [bef. 1000; ME when(ne), OE hwenne; c. G wann when, wenn if, when (cf. Goth hwan when, how); akin to WHO, WHAT] |
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