1、选用括号内恰当的介词填空。

1) What’s this 　　　　　　( at, on, in ) English?

2) Christmas is 　　　　　　( at, on, in ) the 25^th of December.

3) The man 　　　　　　( with, on, in ) black is Su Hai’s father.

4) He doesn’t do well 　　　　　　( at, on, in ) PE.

5) Look at those birds 　　　　　　( on, in ) the tree.

6) We are going to meet 　　　　　　( at, on, in ) the bus stop 　　　　　　( at, on, in ) half past ten.

7) Is there a cat 　　　　　　( under, behind, in ) the door?

8) Helen’s writing paper is 　　　　　　( in, in front of ) her computer.

9) We live 　　　　　　( at, on, in ) a new house now.

10) Does it often rain 　　　　　　( at, on, in ) spring there?

3、in一词还有其他的固定搭配，如：in blue(穿着蓝色的衣服)，in English(用英语表达)，take part in(参加)。

练一练：

2、表示时间的介词有：at, on, in。(1)at表示“在某一个具体的时间点上”，或用在固定词组中。如：at ten o’clock, at 9:30 a.m., at night, at the weekend…(2)on表示“在某日或某日的时间段”。如：on Friday, on the first of October, on Monday morning…(3)in表示“在某一段时间(月份、季节)里”。如：in the afternoon, in September, in summer, in 2005…

1、一种虚词。不能单独作句子成分，它只有跟它后面的宾语一起构成介词短语，才能在句子中起作用。有：in, on, under, with, behind, about, near, before, after, for, to, up, down, from, in front of, out of, from…to…, at the back of…

2、用括号内所给单词的适当形式填空。

1) I can swim as 　　　　　　( fast ) as the fish, I think.

2) Look! His hands are 　　　　　　( big ) than mine.

3) I think you do these things 　　　　　　( well ) than your classmates.

4) Whose bag is 　　　　　　( heavy ), yours or mine?

5) Does Jim run as 　　　　　　( slow ) as David? Yes, but Mike runs 　　　　　　( slow ) than them.

6) You have seven books, but I have 　　　　　　( many ) than you. I have ten.

7) I jump 　　　　　　( far ) than some of the boys in my class.

8) I’m very 　　　　　　( thin ), but she’s 　　　　　　( thin ) than me.

9) It gets 　　　　　　and 　　　　　　( warm ) when spring comes here.

1、写出下列形容词、副词的比较级。

big 　　　　　　　good 　　　　　　　long 　　　　　　　tall 　　　　　　　old 　　　　　　　

short 　　　　　　　thin 　　　　　　　heavy 　　　　　　　young 　　　　　　fat 　　　　　　　

light 　　　　　　　strong 　　　　　　　high 　　　　　　　far 　　　　　　　low 　　　　　　　

early 　　　　　　　late 　　　　　　　well 　　　　　　　fast 　　　　　　　slow 　　　　　　　

2、形容词、副词比较级的规则变化如下：

(1)一般直接+er。如：tall - taller, fast - faster　 单音节词如果以-e结尾，只加-r。如：late - later

(2)重读闭音节词如末尾只有一个辅音字母，须双写这个字母，再加-er。如：big - bigger, fat - fatter

(3)以辅音字母加-y结尾的词，变y为i，再加-er。如：heavy - heavier, early - earlier

(4)双音节和多音节词的比较级应在原级前加more构成。如：beautiful - more beautiful,

careful - more careful, quietly - more quietly, interesting - more interesting

(5)有些不规则变化的，须逐一加以记忆。如：good/well – better, bad/ill – worse, many/much – more, far – farther/further, old – older/elder…

练一练：

1、形容词表示某一事物或人的特征，副词表示某一动作的特征。形容词和副词有三种形式：原形、比较级、最高级。比较级：+er　 最高级：the …+est

两个重要特征：as……as中间一定用原形，than的前面一定要+er。

3、用所给词的适当形式填空。

1)That is not _________ kite. That kite is very small, but _________ is very big. ( I )

2)The dress is _________. Give it to _________. ( she )

3)Is this _________ watch? ( you ) No, it’s not _________ . ( I )

4)_________ is my brother. ________ name is Jack. Look! Those stamps are _________. ( he )

5)_________ dresses are red. ( we ) What colour are _________? ( you )

6)Show _________ your kite, OK? ( they )

7)I have a beautiful cat. _________name is Mimi. These cakes are _________. ( it )

8)Are these ________ tickets? No, ________ are not _________. ________ aren’t here. ( they )

9)Shall _________ have a look at that classroom? That is _________ classroom. ( we )

10)_________ is my aunt. Do you know _________ job? _________ a nurse. ( she )

11)Where are _________? I can’t find _________. Let’s call _________ parents. ( they )

12)Don’t touch _________. _________ not a cat, _________ a tiger! ( it )

13)_________ sister is ill. Please go and get _________. ( she )

14)The girl behind _________ is our friend. ( she )

2、想一想，把下表补充完整。