一.表示A与B在程度相同时,可用”as +形容词或副词的原级as”结构.表示A不如B时,可用”not so/as+形容词或副词的原级结构.如:

　　1.Nowadays science fiction isn’t as_________as cartoons among teenagers.

　　A.popular B. more popular C. less popular D.the most popular

　　2.Write___________and try not to make any mistakes.

　　A.as careful as possible B,as carefully as you can C,most careful D,more careful

　　3.The Yellow River is___________ the Changjiang River.

　　A.not as long as          B.as long as       C.not long as          D.longer than

　　4.Tom never does is homework_______Mary.He always makes lots of mistakes.

　　A.so careful as    B.carefully as     C.as careful as    D.as carefully as

　　二.表示A比B在程度上”更….”时,可用”形容词或副词的比较级+than “结构.如:

　　1.The air in Beijing is getting much ________now than a few years ago.

　　A. clean    B.cleaner     C.cleanest      D.the cleanest

　　2.Moble phones are very popular now and they are ____than before.

　　A.cheap       B.cheaper     C.the cheap   D.the cheapest

　　3.Knowledge is money.

　　__But I think it is _______money.

　　A.as important as        B.so important as            C.more important than          D.the same as

　　三.表示者或三者以上的比较,其中一个在程度上”….”时常用”the+最高级”后面可带”of/in的短语”来说明比较的理由,如:

　　1.Do you like English?

　　____Yes ,But I think it’s_____subject of all.

　　A.the easiest    B.the most difficult        C.the most interesting          D.the most boring

　　2.Zhangfan is the strongest student in our class and Zhangfei is the second_________one .

　　A.strong        B.sronger      C.strongest           D.the stronges

　　3. The river _____to the sea .It is ____one in the country.

　　A.runs;the longest       B.runs ,a longer          C.is run, the longest       D.run .a longer

　　四.在形容词或副词的比较级前,可以用”a little, even , much,a lot ,still来修饰,用来加强语气.如:
    1,All of us are proud of the great changes in Shanghai.We are sure Shanghai willl be even ____tomorrow.
    A.good           B.beeter             C.best           D.the best

　　2.In our city ,it ’s__in July ,but it’s even____ in August.

　　A.hotter,hottest        B.hot,hot          C,hotter,hot         D,hot ,hotter

　　3.Do you like western food?

　　__No,The food of our country is ____________that of western countries.

　　A.rather good than B, much better than C,more better than D,not so good as.