# Lesson 29
### New words and expresslons 生词和短语
1. shut v. 关门
2. bedroom n. 卧室
3. untidy adj. 乱，不整齐
- tidy adj 干净整齐的
> -un 反义词前缀
```
e.g. happy adj. 开心
unhapppy adj. 不开心
```
4. must modal verb 必须，应该 情态动词
> 注意：情态动词后用动词原形！情态动词作为助动词用。
```
e.g. I must go home.
Must you go (home) now?
What must I do? 我必须做什么？
You mustn't go now.
```
5. open v. 打开
6. air v. 使...通风，换换空气
```
e.g. Air the room
by air 乘飞机
= by plane
e.g. go to Shanghai by air.
```
7. put v. 防置
```
e.g. Put the book on the table.
```
8. clothes n. 衣服
> 注意：本身就是复数。
```
e.g. There are some clothes on the couch.
```
9. wardrobe n. 衣柜
10. dust v. 掸掉灰尘
- dust the table
11. sweep v. 扫
- weep v. 哭泣
```
e.g. sweep the floor
```
```
其他人敲门时
come on in. 译为“快进来”，比较热情
Coming! Coming! 我来了，来了。---我去开门
make the bed 铺床，整理床铺
```
### 祈使句
祈使句省略主语you.所以以动词原形开头，往往表示请求、命令、建议、叮嘱等
```
e.g. Open the door.
Look!
sit down,please.
Give me your hand.
```
否定句在句首加don't或do not（语气更强）
```
e.g. Don't do that.
Do not do that.
```
```
Let's go home. 咱们回家吧！'s代替us
Let's have a breeak! 咱们休息一下吧！
Let us go home. 让我们回家吧！
Let us have a break. 让我们休息一下吧
let's 表示提议，讲的人和听的人一起去做
let us 表示请求, "让我们...."
```
祈使句若有两个动词常用and连接
```
Come and see my new dress.
Go and wosh your hands.
wait and see. 等等看，等着瞧
```
