AS AS 的用法.docx

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AS AS 的用法
as + 形容词或副词原级 + as?”意为“和??一样”，表示同级的比较，但要注意第一个as为副词，第二个as为连词。根据比较对象和性质的不同又可以把此种结构分为三种：gave him as much as he could eat. 他能吃多少，我就给了他多少。
We’ve got food for as many people as want it. 我们的食物，无论多少人吃都够了。
(4) 该结构根据情况可用使用以下修饰语。如：(not) nearly, almost, just, nothing like, exactly, not quite, half, oneten, twice, three times, 30 per cent等，并且这些修饰语必须置于第一个as之前，而不能置于其后。如：
He doesn’t play half as well as his sister. 他演奏的水平不及他姐姐的一半。 This dress is twice as expensive as that. 这件连衣裙比那件贵一倍。
(5) 若第二个as引导一个表示将来意义的从句，则该从句可用现在时表示将来，也可直接使用将来时态。如：
We’ll get there as soon as you do [will]. 你一到，我们就到。
(6) 在非正式场合(尤其是美国英语中)，有时可以省略第一个as。如：
When over forty, he married a woman poor as himself. 他在40多岁时娶了一个像他本人一样穷的女人。
另外，若意思明确，有时可省略第二个as及其后的相关词语。如：
The radios in that shop will be cheaper, but not as good. 那家商店的收音机会便宜些，但质量没那么好。
“as + 形容词或副词原级 + as…” 意为“和……一样”，表示同级的比较，但要注意第一个 as 为副词，第二个 as 为连词。根据比较对象和性质的不同又可以把此种结构分为三种：
（一）“ as … as …结构”用于表示不同人或物同一性质的比较，意为“……和……一样…… 。例如 The tree is as tall as the building(is) ．
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这棵树和那栋楼一样高。
注意此结构也常用于形象比喻中： as cool as cucumber 沉着的， as stubborn as a mule 非常顽强的，倔强的， as clear as crystal 非常透明的， as poor as a church mouse 非常贫困的， as busy as a bee 像蜜蜂一样忙碌， as easy as ABC 像 ABC 一样容易， as deep as a well 像井一样深， as light as a feather 像羽毛一样轻， as soft as butter 像黄油一样软。这些短语生动活泼，浅显易懂，记住这些短语可以提高学生的英语写作和口语能力。
（二）“ as …