第1个回答 2014-01-05
在....之前 He will leave here before Monday.直到.....才... I dont go to bed until 10. 一....就..... I will call you as soon as i arrive home.在.....之后 the students play games after class.当...的时候(表示两件事同时进行的) Mum is cooking while Dad is reading the newspaper当...的时候(两件事不是同时进行的) He fixes the bike when the doorbell is ringing.本回答被网友采纳