高一英语语法归纳整理——定语从句的归纳

　　区别：

　　①as引导的非限制性定语从句可以放在主句前面、插在主句中间或放在主句末尾；而which引导的非限制性定语从句只能放在主句后面。

　　He married her, as/which was natural.  =As was natural, he married her.  Mark Twin is a great writer, which/as is known to all. =As is known to all, Mark Twin is a great writer.

　　②as引导的从句有“正如”、“正像”之意，而which则无此意。

　　常用句型有：

　　as we all know, as is known to all, as everybody can see, as is expected, As is known/ said/ reported/ told/ we all know等。

　　如：

　　As we all know, paper was first made in China. To shut your eyes to facts, as many of you do, is foolish.

　　③主句和从句有因果关系时，用which.  Our class has won the football match, which made us very happy.

　　Bamboos are hollow, which makes them very light.

　　④从句含否定意义时常用which.

　　She didn’t pass the exam, which we couldn’t expect.

　　She didn’t pass the exam, as we expected.

　　6.when关系副词：指时间。在定语从句中作时间状语，不能省略。此时的when还可用介词+which替换（此时先行词一定是表时间的名词）。

　　I still remember the time when I joined the League.

　　＝I still remember the time on which I joined the League.

　　＝I still remember the time （which/that） I joined the League on.

　　7.where关系副词：指地点。在定语从句中作地点状语，不能省略。此时的when还可用介词+which替换（此时先行词一定是表地点的名词）。

　　I still remember the school where I joined the League.

　　＝I still remember the school in which I joined the League.

　　＝I still remember the school （which/that） I joined the League in.

　　※注：对关系副词when, where的认识。

　　①。 先行词是时间的名词，并非都用关系副词when引导定语从句。

　　I’ll never forget the time （which/that） I spent in Beijing.

　　②。 先行词是地点的名词，并非都用关系副词where引导定语从句。

　　This is the factory （which/that） he visited yesterday.

　　③。 当句型为It/This/That is（was） the first（second…last） time引起的句子时用that连接其后的句子。此时的time是次数，不是时间。

　　It/This is the first time that we travel.

　　It/This is the last time that I shall give you a lesson.

　　8. why指原因，在定语从句中作原因状语，先行词通常为reason,不能省略。且why引导的定语从句只能是限定性定语从句。

　　Why= for which  I don’t know the reason why he was late yesterday.

　　The reason why（for which） he was late is that he missed the bus.

　　※注：当先行词为reason时，关系副词并非都用why。

　　This is the reason （that/ which） he gave/ explained to us.

　　【判断用关系代词还是关系副词】

　　从句缺少的是主语、宾语还是状语是确定用关系代词还是关系副词的关键。

　　试比较：

　　I will never forget the day （which/that） I spent in Hongkong.   （ spent是及物动词，后缺宾语，因此用关系代词或省略 ）

　　I will never forget the day when/on which Hongkong returned to its motherland.  （ 从句主谓宾结构完整，缺状语，因此用关系副词或介词加关系代词 ）

　　The reason （that/which）he gave for not coming to school yesterday isn’t believable.  （ gave是及物动词，后缺宾语，因此用关系代词或省略 ）

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