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。一、时间状语从句1．when, while, as 引导的时间状语从句的主从句动作发生的顺序及主从句的时态要求。我们在 Module 3 学习了由 when, while，as 引导的时间状语从句，本课时主要讲一下它们引导时间状语从句时主从句动作发生的顺序及时态要求。(1)主从句动作发生的顺序when 与 as 引导的时间状语从句，主从句谓语动词可以同时发生也可以先后发生；while 引导的时间状语从句，主从句谓语动词同时发生或主句动作发生在从句动作进行的过程中。When he had finished his homework, he took a short rest.当他完成作业后，他休息了一会儿。(从句动作先发生)When I got to the airport, the guests had left.当我赶到飞机场...
