when [wɛn]

例句:

• When life gets hard and you want to give up, remember that life is full of ups and downs, and without the downs, the ups would mean nothing.
  当生活很艰难，你想要放弃的时候，请记住，生活充满了起起落落，如果没有低谷，那站在高处也失去了意义。
  
• The best thing to do when entering unknown territory is smile.
  踏入未知地带最好的对策就是微笑。
  
• This is not normal when expressing grief and sadness.
  来自BBC
• When she left, politicians spoke of little else.
  来自BBC
• We're not sure when the curfew is tonight.
  来自BBC
• Good luck is when an opportunity comes along and you're prepared for it.
  好运就是当机会来临时，你早已做好了准备。
  
• When did you see him last?
  你上次是什么时候见到他的?
  来自《权威词典》
• I don't know when to start.
  我不知道何时开始。
  来自《权威词典》
• That was when I was eight.
  那是我八岁时的事情了。
  来自《权威词典》