一、形容詞與副詞的同級比較：由“as(so)…as”引出，其否定式為“not so…”或“not as…as”，此外還應注意下列含有“as”結構或短語的句子。

　　1. as such：表示上文所指明的事或人。

　　He is a child，and must be treated as such. 他是個孩子，必須被當作孩子對待。

　　2. as much：表示“與…同量”

　　Take as much as you like. 拿多少都行。

　　I would gladly have paid twice as much for it. 就是價格再貴一倍，我也會愿意把它買下的。

　　He as much as admitted the whole story. 他幾乎全部承認了。

　　3. as many：表示“與…一樣多”

　　I found six mistakes in as many lines. 我在六行中發(fā)現(xiàn)了六個錯。

　　二、表示“幾倍于”的比較級：用twice (兩倍)，four times (四倍)，ten times (十倍)加上as … as 結構

　　This one is four times as big as that one. 這個是那個的四倍大。(這個比那個大三倍。)

　　Our campus is three times as large as yours. 我們的校園比你們的大兩倍。

　　He has books twice as many as she does. 他的書比她多一倍。

　　三、“the same +名詞+as”表示同等比較。

　　四、比較級前可用a little，a bit，slightly，a great deal，a lot，many，much等詞語表示不定量，far，completely，still表示程度或更進一步。

　　五、與比較級有關的特殊詞用法

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

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

　　人沒有食物不能生存，植物沒有陽光也不能生長。

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

　　這項任務沒有困難，那項任務也沒有困難。

　　2. no less than 表示“不亞于”

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

　　出席新年晚會的有五百人之多。(出席的人較多)

　　3. not less than 表示“不少于”

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

　　出席新年晚會的只有五百人。(出席的人較不多)

　　4. more often than not 表示“多數(shù)情況下”

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

　　多數(shù)情況下，他星期五來得晚。

　　5. all the more 因而更加

　　We really admired him all the more for his frankness. 我們更加欽佩他的坦率。

　　6. (be)better off 較富裕，環(huán)境較好

　　7. had better 最好……

　　Come，you had much better have the thing out at once. 來，你最好把這東西弄出去。

　　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.第一列蒸汽火車最快每小時只有13英里，那時的大船還不到這個速度的一半。

　　9. little more than 差不多

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

　　他們倉的糧食跟我們倉的糧食差不多。

　　10. more than 超過，不止

　　I have waited for your for more than two hours. 我等了你兩個多小時。

　　11. more or less 大體上，或多或少

　　The work is more or less finished. 工作大體算完成了。

　　Most of them came here to near money，more or less Mr.Wang worked for his cause.他們大都來掙錢的，但王先生有點像為事業(yè)而工作。

　　12. other than 除了

　　They imposed no pre conditions other than that the meeting should be held in their capital. 除了會議要在他們的首都開之外，他們沒有提出任何先決條件。

　　13. rather than 而不是，與其…寧愿(rather than表示“與其…寧愿”時，如果位于句首引導句子，有虛擬的成分，相當于“… would rathe than，”所以rather than后面跟動詞原形)

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

　　讀你感興趣的東西，讀你有時間讀的東西，如雜志和報紙而不是小說。

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

　　她以半價把土豆給賣了，而沒有讓它們爛掉。

　　Rather than cause trouble，he left.

　　為了不惹事，他還是走了。

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