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1."too...to..."結(jié)構(gòu)的用法

The boy is too short to reach the apple.這個(gè)男孩太低了而不能夠到蘋(píng)果。

too...to...結(jié)構(gòu)是中學(xué)階段一個(gè)很常用的結(jié)構(gòu)，意為"太……而不能……"，表示否定的含義。但在下面的情況中卻表示肯定的含義：

（1）當(dāng)在該結(jié)構(gòu)中的too或to前加上否定詞not或never等時(shí)，該結(jié)構(gòu)即為表示肯定含義的結(jié)構(gòu)。cannot/cannever...too...to...為常見(jiàn)的用法，它可以與cannot/cannever...enoughto... 結(jié)構(gòu)進(jìn)行轉(zhuǎn)化。如：

Youcan’t be toocareful/careful enough to cross the street.過(guò)街時(shí)怎么小心都不為過(guò)。

（2）當(dāng)too...to...結(jié)構(gòu)中的副詞too后接ready, anxious, eager, glad, willing等形容詞時(shí)，該結(jié)構(gòu)表達(dá)的為肯定的含義。如：

She is too willing to marry him.她很愿意嫁給他。

（3）當(dāng)too...to...結(jié)構(gòu)中的副詞too前面有all,but, only, quite等修飾時(shí)，該結(jié)構(gòu)表達(dá)的也為肯定的含義。如：

Iam only too pleased to help you.我很高興幫助您。

2.  so...that...與such...that...句型

so...that與such...that都表示"如此……以至于"，但用法不同。

1.so...that...引導(dǎo)結(jié)果狀語(yǔ)從句的用法有以下幾種：

（1）so+adj./adv.+that...

(2) so+adj.+a/an+可數(shù)名詞單數(shù)+that...。

此句型亦可與"such +a/an+adj.+可數(shù)名詞單數(shù)+that..."句型互換。如：

This was so good a book that I read it twice. = This was sucha good book that I read it twice.

(3)  so+much/many/few/little(少)+n.+that...

2.such...that... 可引導(dǎo)結(jié)果狀語(yǔ)從句，有三種用法：

(1) such +a/an+adj.+可數(shù)名詞單數(shù)+that...。如：

He is such an honest student that we all believehim.

(2)such+adj.+可數(shù)名詞復(fù)數(shù)+that...。如：

He has such big feet that no shoes in the shop fithim. 

(3)such+adj.+不可數(shù)名詞+that...。如：

This was such fine music that it was worth listening totwice.

3. ...enough to...結(jié)構(gòu)

He is old enough to go to school .他的年齡足夠大，可以去上學(xué)了。

enough在英語(yǔ)中既可以用作形容詞，又可以用作副詞。

（1）當(dāng)enough用作形容詞時(shí)，它既可以修飾可數(shù)名詞，又可以修飾不可數(shù)名詞；它既可以放在名詞前，又可以放在名詞后。如：

There was food enough/enough food to last a wholeyear.

有充足的食物，足夠吃一整年的了。

（2）當(dāng)enough用作副詞時(shí)，它要位于形容詞或副詞之后。如：

IfI had a long enough holiday, I’d visitEurope, stopping at all the small interesting places.

要是我有足夠長(zhǎng)的假期的話，我會(huì)游覽歐洲，在每一處有趣的小地方都停下來(lái)看看。

【典例】Although she did not know Boston well, she madeher way _____to the Home Circle Building.

A. easy enough   B. enough easy

C. easily enough   D.enough easily

錯(cuò)因分析 由于題干中的動(dòng)詞made為一個(gè)行為動(dòng)詞，故應(yīng)用副詞修飾，部分考生會(huì)因忽略這一點(diǎn)而誤選A或B。

解析 本題是對(duì)enough用法的考查。由于enough修飾形容詞或副詞時(shí)要位于它們之后，故C為本題的答案。