有時(shí)，不同的比較結(jié)構(gòu)可以表示相同的意思，因此，它們可以相互轉(zhuǎn)換。

　　1. not as/ so……as與less……than的轉(zhuǎn)換

　　The place was not as/ so crowded as it usually is yesterday.

　　The place was less crowded than it usually is yesterday.

　　昨天，這個(gè)地方不像平常那樣擠滿(mǎn)了人。

　　2. more……than與less……than, not as/ so…as的轉(zhuǎn)換

　　Your picture is more beautiful than his.

　　His picture is less beautiful than yours.

　　His picture isn't as/ so beautiful as yours.

　　你的畫(huà)比他的好看。

　　3.最高級(jí)與more……than, no……more than的轉(zhuǎn)換

　　Math is the most difficult subject of all.

　　Math is more difficult than any other subject.

　　No subject is more difficult than math.    數(shù)學(xué)是所有學(xué)科中最難的。

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