用as造句定语从句(2)

　　b.the same…as与the same…that的区别：

　　the same…as指两物相似，the same..描述的是同一物。

　　This is the same bag as I lost yesterday.

　　这个书包和我昨天丢失的（书包）相似。（相似物）

　　This is the same bag that I lost yesterday.

　　这正是我昨天丢失的那个书包。（同一物）

　　2.准关系代词as引导非限制定语从句。

　　a.as引导非限制性定语从句，只代表主语或主句的一部分所表达的意思(不能指代某个名词或代词)，可以放在主句前，后或中间，在从句中作主语或宾语、例如：

　　As is known to all, he is the best student in our class. (as指代整个句子，作主语，置于句首)

　　He opposed the idea, as could be expected. (as 指代整个句子，作主语，置于句末)

　　As we all know, he studies very hard. (as 指代整个句子，作宾语，置于句首)

　　Tai is, as you know, an inseparable part of China. (as指代整个句子，作宾语，置于句中)

　　常用的这类句式有：

　　as is said above 综上所述 - as is known to all 众所周知

　　as is often the case 通常如此 - as is reported in the newspaper 如报纸所报导的

　　b.主句具有否定意义，as引导的定语从句位于主句之后时，as指代得主句不包括否定意义，并可用but取代。例如：

　　Whales are now fish, as some people think / but some people think they are.

　　I am no orator, as Brutus is.我不善言词,而勃鲁特斯却是个雄辩家.

　　Spiders are notinsects,as many people think, nor even near1y related to them.

　　蜘蛛不是昆虫,尽管许多人认为它是昆虫,它甚至与昆虫几乎没有关系.

　　但as引导的定语从句谓语主句前时，as指代的主句仍包括否定意义。

　　As has been said above, grammar is not a set of dead rules.

　　正如前面所说的，语法不是一套死条纹。