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以下就是辛达雅思代报小编为大家整理的雅思长难句句式分析之than和as作准关系代词。期望对各位考生的备考有所帮助：

2.3 as + n. + as…

Heis as tough a guy as ever lived.（作主语）

Ihave as good a dictionary as you (do).（作宾语）

这儿的do等于及物动词have，因前后行为动词共同，后年往往会改为do的一个变体do, does或did，而且能够省掉。

He is as good a man as David (is).（作表语）

2.4 as可替代主句

独自使用as时，as也能够作联系代词，相似于which，用来替代整个主句。

Heis nice, which is known to us. =

Heis nice, as is known to us.

这儿which和as都是修饰前面的主句的。

Heworks hard, which we all know. =

Heworks hard, as we all know. =

As we all know, he works hard.

as引导的从句可前可后，而which引导的从句只能在后边。

课堂练习1.

The central state, though often very richand very populous, was intrinsically fragile, since the development of newinternational trade routes could undermine 

the monetary base and erode statepower, as occurred when European seafarers circumvented Middle Easternmerchants after Vasco da Gama's voyage 

around Africa in the latefifteenth-century opened up a southern route.

2.5 As + be + p.p.时，be动词能够省掉。

Heis nice, which was mentioned before. =

Heis nice, as was mentioned before. =

Heis nice, as mentioned before.

Hewas drunk, as usual. =

Hewas drunk, as is usual.

小编找到的是作者的一些见解，希望可以为考生们寻找到最好得分方式，也希望对大家有所帮助。最后，希望广大考生们在备考过程中提升自己的语言水平，取得更好的成绩。

有需要代报考位的同学们，可以直接联系我们，辛达雅思代报竭诚为您服务。(*^__^*)