一、形容词与副词的同级比较：由“as(so)…as”引出，其否定式为“not so…”或“not as…as”，此外还应注意下列含有“as”结构或短语的句子。

　　1. as such：表示上文所指明的事或人。

　　He is a child，and must be treated as such. 他是个孩子，必须被当作孩子对待。

　　2. as much：表示“与…同量”

　　Take as much as you like. 拿多少都行。

　　I would gladly have paid twice as much for it. 就是价格再贵一倍，我也会愿意把它买下的。

　　He as much as admitted the whole story. 他几乎全部承认了。

　　3. as many：表示“与…一样多”

　　I found six mistakes in as many lines. 我在六行中发现了六个错。

　　二、表示“几倍于”的比较级：用twice (两倍)，four times (四倍)，ten times (十倍)加上as … as 结构

　　This one is four times as big as that one. 这个是那个的四倍大。(这个比那个大三倍。)

　　Our campus is three times as large as yours. 我们的校园比你们的大两倍。

　　He has books twice as many as she does. 他的书比她多一倍。

　　三、“the same +名词+as”表示同等比较。

　　四、比较级前可用a little，a bit，slightly，a great deal，a lot，many，much等词语表示不定量，far，completely，still表示程度或更进一步。

　　五、与比较级有关的特殊词用法

　　1. no more than …表示“只不过”，“并不比…”(等于not any more than)

　　Man cannot live without food any more than plants can grow without sunshine.

　　人没有食物不能生存，植物没有阳光也不能生长。

　　There is no difficulty with this task any more than with that one.

　　这项任务没有困难，那项任务也没有困难。

　　2. no less than 表示“不亚于”

　　There are no less than five hundred people present at the New Year party.

　　出席新年晚会的有五百人之多。(出席的人较多)

　　3. not less than 表示“不少于”

　　There are not less than five hundred people present at the New Year party.

　　出席新年晚会的只有五百人。(出席的人较不多)

　　4. more often than not 表示“多数情况下”

　　On Friday mornings，he comes late more often than not.

　　多数情况下，他星期五来得晚。

　　5. all the more 因而更加

　　We really admired him all the more for his frankness. 我们更加钦佩他的坦率。

　　6. (be)better off 较富裕，环境较好

　　7. had better 最好……

　　Come，you had much better have the thing out at once. 来，你最好把这东西弄出去。

　　8. less than 不到

　　The first steam locomotive could have a top speed of only thirteen mph(miles per hour)and the great sailing ships of the time labored along at less than half that speed.第一列蒸汽火车最快每小时只有13英里，那时的大船还不到这个速度的一半。

　　9. little more than 差不多

　　The grain in their barn is little more than that of ours.

　　他们仓的粮食跟我们仓的粮食差不多。

　　10. more than 超过，不止

　　I have waited for your for more than two hours. 我等了你两个多小时。

　　11. more or less 大体上，或多或少

　　The work is more or less finished. 工作大体算完成了。

　　Most of them came here to near money，more or less Mr.Wang worked for his cause.他们大都来挣钱的，但王先生有点像为事业而工作。

　　12. other than 除了

　　They imposed no pre conditions other than that the meeting should be held in their capital. 除了会议要在他们的首都开之外，他们没有提出任何先决条件。

　　13. rather than 而不是，与其…宁愿(rather than表示“与其…宁愿”时，如果位于句首引导句子，有虚拟的成分，相当于“… would rathe than，”所以rather than后面跟动词原形)

　　Read what interests you;read what you have time for magazines and newspapers rather than novels.

　　读你感兴趣的东西，读你有时间读的东西，如杂志和报纸而不是小说。

　　Rather than allow the potatoes to go bad，she sold them at half price.

　　她以半价把土豆给卖了，而没有让它们烂掉。

　　Rather than cause trouble，he left.

　　为了不惹事，他还是走了。

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