Unit 4 TV Programmes语法指南 1。 表示时间的介词短语“from…to…”“between…and…” ★from…to…表示“从某时到某时"。如： ①He works from nice o’clocps。 咱们等雨停吧。 ④The teacher kept on asking the students questions until (till） the bell rang. 老师反复向学生提问,直到下课铃响。 ⑤He continued working up till （until） he died。 他一直工作到去世。 ⑥Until you told me I had no idea of it. 在你告诉我之前,我对此一无所知. 3。 while / as的用法 ★while用作连词,意为“在……期间"“当……时候”。它表示某个动作正在进展时另一个动作发生了；还可以表示某个动作还在进展的同时，，所以从句的谓语动词必须用持续性动词或状态动词。： ①My father fell asleep while he was reading the newspaper。 我父亲在看报时睡着了。 ②While mother was cooking， father was repairing the bookcase. 当妈妈在烧饭时,爸爸在修书架。 ③While my uncle is away on holiday, I’m going to stay in his house of a week. 我叔叔外出度假时,我将在他家呆一个星期。 ④While I was sleeping, a thief entered the house. 我睡觉时,小偷进了我的屋。 ★while还可以表示“然而”，： ①I like music while my brother likes sports。 我喜欢音乐而我的哥哥喜欢体育。 ②Girls do well in Chinese while boys are good at maths。 女孩的语文好而男孩的数学好。 ③Nodding the head means agreement， while shaking it means disagreement. 点点头表示同意，而摇头表示不同意。 ★while也可用作“只要”解，相当于as long : ①While there is water， there is life。 只要有水就有生命。 ②While there is life， there is hope. 留得青山在,不怕没柴烧。 ★as作连词用，引导时间状语从句，意为“当……时候”,强调at the same time,不指先后，而指同时发生,: ①As you leave， please take a raincoat with you。 当你分开时,请随身带件雨衣。 ②She dances as she
