外研社必修五module 5 Grammar精要.ppt

as 和which 引导非限制性定语从句的区别 which引导的从句只能放在主句之后；as引导的从句，可放在句首、句中或句尾。 which既可代指先行词，又可代指整个主句的内容。相当于 “and this” 或 “and that”. 译为“这一点”。as只能代指整个主句的内容。常带有“正如”之意，且已形成固定结构: as is known, as is reported, as is said, as is expected, as we know, etc. 1. Einstein, as is known, is a famous scientist. 2. As is reported, China has become an important country in the world. 3. Taiwan belongs to China, as is known to all. 4. Bamboo is hollow, which makes it very light. 5. He didn’t come to attend the meeting, as is expected. 3. as在从句中作主语，从句中的谓语必须 是系动词；而which则不一定。 He is very strict, as is shown in his  work. 4. 先行词前有the same, such限定时，关 系词只能用as. I have the same opinion as you (have). Don’t read such books as are beyond  your ability. 当先行词受the same 修饰时，有时也用 that引导定语从句，但与as引导的定语从句意思有区别。 She wore the same dress as her younger sister wore.? She wore the same dress that she wore at Mary’s wedding.? 5.主从之间存在逻辑上的因果关系时，关系词往往用which。 Tom was late for school again and again, which made his teacher very angry.? 关系副词的用法 指代内容 所做成分 是否可省略 when 时间 状语 否 where 地点 状语 否 why 原因 状语 否 I’ll never forget the day when I joined the league. on which I’ll never forget the time which/that was spent with you. when在定语从句中作时间状语，先行词往往是表示时间的名词。相当于介词+which 若定语从句缺主语或宾语，需用which或that引导定语从句。 This is the house where I lived two years ago. in which The library (which/that) you visited yesterday was built in 1990. where在定语从句中作地点状语，先行词往往是表示地点的名词。相当于“介词 + which”。 若定语从句缺主语或宾语，用which或that引导定语从句。 where 引导的定语从句也可以修饰case, condition, situation, instance, 等先行词。 There are cases where this rule does not hold good. Can you think of a situation where this word can be used? Do you know the reason why she was late. The reason why / for which he refused the invitation is quite clear.? why在定语从句中作原因状语，常位于reason之后，相当于for which。 the reason why…is that… ……的原因是…… 他辞职的原因是他和老板吵架了。 The reason why he resigned was that he quarreled with his boss. Mencius believed that the reason why man is different from a