when ：当时;什么时候;（用于时间的表达方式之后）在那时，音标：英 [wen] 美 [wɛn]
双语例句：
When are you going home?
你什么时候回家？
When eating a whole cooked fish, you should never turn it over to get at the flesh on the other side .
吃一整条鱼时，切忌把它翻过来去吃另一面的肉。
When I met the Gills, I had been gardening for nearly ten years.
遇到吉尔一家时我已经做了近10年的园艺工作。
When he brought Imelda her drink she gave him a genuine, sweet smile of thanks .
当他把饮料拿给艾梅尔达时，她真诚而甜美地向他微笑以示感谢。
I asked him when he'd be back to pick me up .
我问他什么时候回来接我。