【本讲教育信息】

一、教学内容：

（一）情态动词can及have to

（二）形容词的比较级

二、知识总结与归纳

（一）情态动词can 及have to

1. 【can的基本用法】

（1）用来表能力，意为“能，会”。

I can swim, but he can’t.

(2) 用于“ Can you…”句型中，表示客气的邀请对方做……。肯定回答常用：Sure, I’d love to./ I’d like to. 否定回答常用：Sorry, I can’t. I … (说明原因)或 I’d love to, but….如：

--- Can you go to the concert with me this evening?

--- I’d love to, but I have too much homework to do.

【基本句式】

① 肯定句：主语+can+动词原形

② 一般疑问句：Can +主语+动词原形？ Yes, sb. can. / No, sb. can’t.

③ 否定句：主语+can’t + 动词原形

2. 【have to的基本用法】

表示客观上不得不做某事。

【基本句式】

①肯定句：主语+have / has to +动词原形+其他 过去式为had to

②一般疑问句：Do / Does+主语+have to+动词原形+其他？(肯定回答：Yes, 主语+do/ does；否定回答：No, 主语+don’t / doesn’t)

③否定句：主语+don’t / doesn’t +have to+动词原形+其他。

【学以致用】

1. He can ________(come) in now.

2. Miss Liu has a toothache and has to _______(go) to the dentist.

3. Lind ____________(have) to go to the Children’s Palace every Sunday.

4. ________ your father _______(have to ) visit Mr. Brown this afternoon?

5. The hirt isn’t dirty. You ________ (not, have to ) wash it.

（二）形容词的比较级

1. 形容词的原级和比较级

A. (1) Alan is very tall.

(2) Alan’s brother is taller than Alan.

B.(1) Lucy is very beautiful.

(2) Lucy’s sister is more beautiful than Lucy.

【区别】句中只出现了一个人或物，没有比较对象时，一般用原级。

两个人或物进行比较时，一般用比较级。

2. 形容词的比较级

●形容词比较级的规则变化

比较级有变化，一般词尾加—er; (long----longer)

词尾哑e简单化，之后只把—r加； （nice ----nicer）

辅音字母+y型，改y为i加—er; (funny---funnier)

一辅重读闭音节，词尾字母应双写； （big----bigger）

双、多音节更容易，之前加more就可以。 （outgoing---- more outgoing）

【注意】一些不规则变化的形容词比较级，同学们要在平时的学习中总结、记忆。如:good—better, many/much---more.

如：(请跟读)

tall – taller outgoing – more outgoing

big– bigger interesting – more interesting

funny – funnier beautiful – more beautiful

nice – nicer delicious – more delicious

many – more athletic – more athletic

good – better serious – more serious

●常用句型

A +谓语动词+比较级+than +B. A比B更……

Cindy looks younger than Julie.

●修饰词

比较级前可用a little, much, so far 等修饰

Your school is a little (much) larger than ours.

【注意】比较的对象要一致

My book is newer than Lucy. （错）

My book is newer than Lucy’s. (对)

例句：（请跟读）

Lucy is taller than Lily.

China is larger than the U.S.A. .

Tom is funnier than Jim.

This box is bigger than that one.

She is more outgoing than her sister.

He is more athletic than his brother.

Mr. Li is more serious than Mr. Zhang.

Pizza is more delicious than hamburger.

3. 学以致用

根据图片和提示词，用比较级造句

第一组： （hair, long）

Lily Lucy

第二组： （fast）

car bike

第三组： （late）

Jim 10:00 Tom 11:00

第四组： （expensive）

100 yuan 200 yuan

第五组： （beautiful）

Wang Mei Li Ting

【典型例题】

一、看图说话

1. ￥2100 ￥5000

2. outgoing serious

Li Yong Shui Junyi

3. funny serious

Zhao Benshan Bai Yansong

二、用所给词的适当形式填空

1. Tom is than Sam.(calm)

2. Pedro is than Paul.(short)

3. Lin Ping is a little than me.(outgoing)

4. Vera is than Jim is. (funny)

5. Tina is much than Tara.(athletic)

6. Paul is even than Pedro.(thin)

7. Paul has hair than Tom.(curly)

8. Ruth is than Rose.(serious)

【模拟试题】（答题时间：15分钟）

* 一、写出下列形容词的比较级

1. short ____________ 2. fine ________________

3. thin ______________ 4. funny _________________

5. beautiful ______________ 6. athletic ________________

7. good / well _________________ 8.many / much _______________

9.bad ______________________ 10. little ____________________

二、用括号中所给词的适当形式填空

1. My cousin is a beautiful girl with very __________ (long) hair.

2. This box is ______________________ (heavy) than that one.

3. I think Lily is _______________ (popular) than Molly in our class.

4. Who is ________________ (outgoing), Lucy or Julie?

5. My elder brother is as __________(old) as your younger brother.

【试题答案】

一、

1. shorter 2. finer 3.thinner 4.funnier 5.more beautiful 6.more athletic

7.better 8.more 9.worse 10.less

二、

1.long 2.heavier 3.more popular 4.more outgoing 5.old