2018-2019学年外研版高中英语必修二教案:Module 5 Newspapers and Magazines SectionⅢ
2018-2019学年外研版高中英语必修二教案:Module 5 Newspapers and Magazines SectionⅢ第1页

Module 5 Newspapers and MagazinesSection Ⅲ Grammar 时间状语从句和原因状语从句

  语法图解

  

  探究发现

  ①When he was orbiting in the capsule, he took photographs of planet earth.

  ②When Yang landed, Premier Wen Jiabao telephoned the Control Centre to offer his congratulations.

  ③Whilehe was travelling in space, Yang spoke to two astronauts aboard the International Space Station.

  ④Whenyou read a newspaper article in English, read the sub­headingsbefore you start ...

  ⑤The manager didn't attend the party because he was ill.

  ⑥"As you have asked me so nicely," said Sharon, "I'd be delighted to sign your arm."

  ⑦Sinceno one else saw the aliens, not many people believe Mr Bates.

  ⑧Now that I have made this first visit, I hope I can come many more times.

  [我的发现]

  (1)例句①②③④中的连词引导时间状语从句;例句⑤⑥⑦⑧中的连词引导原因状语从句。

  (2)when引导时间状语从句时,从句中的谓语动词和主句谓语动词所表示的动作同时发生,如例句①④;也可以在其之前发生,如例句②。

  (3)while引导的时间状语从句中的谓语动作必须是和主句谓语动作同时发生,如例句③;而before引导的时间状语从句中的谓语动作必须在主句谓语动作之前发生,如例句④。

  (4)because引导原因状语从句时,可以置于主句之前,也可以置于主句之后,如例句⑤;而as, since, now that引导原因状语从句时经常置于主句之前,如例句⑥⑦⑧。