老师，作业是在这里伐？我怎么找不到啊 David

@hualiyan
过两天我会贴出来的，请再等几天。。。

好的。。(*^__^*) 嘻嘻……

老师辛苦了，我也跟个帖　！！！！

老师，辛苦了。但是答案什么时候可以公布呢？

GRAMMAR BOOK PAGE 17
Exercise 19
1. Ann had batter make some new friends.
2. Ellen is should study chemistry hard.
3. They had better clean their house before their parents coming home.
4. Alice had better try to learn how to changed a flat tire and pumped her gas.
5. William’s parents had better respect William’s will.
6. Taylors’ daughter should study hard in Demmark.
7. Virginia should stay at home .
8. George had better take the helicopter to go to the airport. If not, he will be late. And his wife will be angry.

Exercise 20
1. John should not have accepted the job. Because his wife has angry.
2. Joe should not have stole a bicycle to give his son. Because this action is a term of opprobrium
3. Donna should not have lend him all of her saving. Because her brother is a squanderer.
4. Sarah should not have told anybody she can speak French.

@Gemini
Ex.19
2. is去掉。情态动词前面不要加be动词。
3.后半句改为before their parents come home. before引导的时间状语从句，必须有谓语动词。coming是现在分词，不能做谓语动词。
4.后半句改为how to change a flat tire and pump。how后面接不定式。

Ex.20
1. because改为小写，用逗号和前面句子相连。原因状语从句不能单独成句。
2.steal的过去分词是stolen。Because的问题同上。
3. lend的过去分词是lent。savings作“储蓄”之意讲，永远用复数。Because的问题同上。

@Leon
Thank you. 批改的真及时，老师很负责啊。：）