when/wen/

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➊ at what time

➋ used after an expression of time to mean “at which” or “on which”

conj. at, in or during a particular time

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➊ [疑问副词] 什么时候，何时：When did you get home? 你什么时候到家的？

◇She asked when the meeting would begin. 她问会议何时开始。

➋ [关系副词] 在那时：I still remember the happy days when we were together. 我仍记得我们在一起的幸福日子。

conj. 当…的时候：He went to school when he was 7. 他7岁时去上学的。

◇Call me when you get there. 到那儿就给我打个电话。

◇He was about to tell me the secret when someone called him. 他正准备告诉我秘密，这时候有人叫他。

音组-en/-en/

hen; men; pen; ten; then; when

常犯错误

✗ When you will receive the letter, read it carefully.

✓ When you receive the letter, read it carefully. 收到这封信时，仔细看看。

[✌时间状语从句中用一般现在时代替将来时]

用法主句用进行时或谓语为be about to do sth时，when引导的时间状语从句多译作“正在这时”。如：We were talking when my cellphone rang. 我们正在谈话，这时候我的手机响了。

辨析as; when; while