英语中的“when”是一个非常多用途的词,可以用作连词、疑问副词,或者用于特定短语中。下面是“when”的几种主要用法及相应的例子: 1. 作为连词:用来引导时间状语从句,表示“在……时”。I was watching TV when the phone rang. (电话响时,我正在看电视。)She always listens to music when she is working. (她工作时总是听音乐。)When I arrived, they were having dinner. (我到达时,他们正在吃晚饭。)
2. 作为疑问副词:用来提问,询问时间。When is your birthday? (你的生日是什么时候?)When did you finish the work? (你什么时候完成的工作?)When will they announce the results? (他们什么时候宣布结果?)
3. 用于特定短语中:有时,“when”会出现在特定的短语或固定搭配中。
since when(从什么时候开始):
Since when have you been interested in photography? (你从什么时候开始对摄影感兴趣的?)
till/until when(直到什么时候):
Till when can I keep the book? (我可以借这本书到什么时候?)
by the time when(到……的时候):
By the time when we arrived, the meeting had already started. (我们到达的时候,会议已经开始了。)
4. 表示“当……时候,突然”:在某些句子中,"when" 用来引入一个突发事件或意外情况。I was walking down the street when I saw the accident. (我正在街上走,突然看到了那场事故。)We were just about to leave when it began to rain. (我们正要离开时,突然下起了雨。)
5. 表示“既然,由于”:在某些上下文中,“when” 用来引出原因或解释。When you don’t like it, why do you keep doing it? (既然你不喜欢,为什么还要继续做?)When I'm already late, I prefer to take my time. (既然我已经迟到了,我宁愿不着急。)
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