外研版高中英语必修3DevelopingandDevelopedCountries.ppt

③We managed to arrive at the place________the car had broken down on the way. A．whether B．if C．unless D．though 答案：D ④Dont be afraid of asking for help________it is needed. A．unless B．since C．although D．when 答案：D ⑤Were going to the bookstore in Johns car. You can come with us________you can meet us there later. A．but B．and C．or D．then 答案：C ⑥John shut everybody out of the kitchen________he could prepare his grand surprise for the party. A．which B．when C．so that D．as if 答案：C ⑦The film brought the hours back to me________I was taken good care of in that far-away village. A．until B．that C．when D．where 答案：C ⑧Someone called me up in the middle of the night, but they hung up________I could answer the phone. A．as B．since C．until D．before 答案：D ⑨—Did you remember to give Mary the money you owed her? —Yes. I gave it to her________I saw her. A．while B．the moment C．suddenly D．once 答案：B ⑩After the war, a new school building was put up______there had once been a theatre. A．that B．where C．which D．when 答案：B (当)我进来时，他正在做家庭作业。 ④I came in when/while he was doing his homework. 当他在做家庭作业时，我走了进来。 ⑤While/When I was in the town, I saw him twice. (当)我在城里时，见过他两次。 ⑥Strike while the iron is hot. 趁热打铁。 when还可译作“这时”，while还可译作“而”。 ①He was playing football outside when it began to rain. 他在外面踢足球，这时开始下起雨来。 ②He is tall while his elder brother is short. 他个子高，而他哥哥个子矮。 2．because, since和as because引导的从句通常表示说话人认为听话人不知道的原因或理由，从句往往是整个主从复合句的重心。 He was annoyed because he missed the bus. 他感到为难是因为他没有赶上那班车。 since和as表示原因时，往往表示人们显然已知道的理由或原因；因此，侧重点是主句的内容，原因只作附带说明。在语气上，because最强，since次之(在意义上相当于汉语中的“既然”)，as最弱。 ①Since his method doesnt work, lets try yours. 既然他的方法不起作用，我们就试一试你的。 ②As she was in a bad mood, we left her alone. 由于她心情不好，我们不去打扰她了。 ③He is absent from school because he is ill. 因为他生病，所以他没来上课。 ④Since everybody is here, lets begin. 既然大家都到了，我们就开始吧。 3．if和unless 引导条件状语从句的连词，主要是if和unless，由if引导的条件状语从句可以是真实条件句，也可以是非真实条件句。真实条件句所表示的条件指的是事实，即可以实现的事，非真实条件句指的是与事实相反或不大可能实现的事。 ①If it