Unit 4 Safety first 核心语法（专项训练）-2026-2027学年译林版（三起）英语五年级上册

【译林版（三起）五年级上册】

Unit 4 Safety first 核心语法专项训练

单元语法小结

语法一：情态动词 should / shouldn’t（核心语法）

1. should + 动词原形

含义：应该（给出安全建议、劝告）

肯定句：主语 + should + 动词原形

You should look left and right. 你应该左右看看。

2. shouldn’t + 动词原形

含义：不应该（= should not，劝告不要做某事）

You shouldn’t run on the road. 你不应该在路上奔跑。

重点提示：should / shouldn’t 所有人称通用，没有三单变化，后面永远加动词原形。

3. 一般疑问句

Should I …?

肯定回答：Yes, you should.

否定回答：No, you shouldn’t.

语法二：祈使句

1. 肯定祈使句：动词原形开头

Keep safe. 注意安全。

2. 否定祈使句：Don’t + 动词原形

Don’t play on the road. 不要在路上玩耍。

3. 辨析：

mustn’t 侧重规则禁令、法律安全要求

Don’t… 通用劝阻，日常提醒

语法三：across / cross 区分

- cross（动词）穿过

Cross the road safely.

- across（介词）穿过，必须搭配动词

Go across the road.

语法四：safe / safely 词性转换

- safe（形容词）安全的，修饰名词或放在be动词后

be safe；a safe place

- safely（副词）安全地，修饰动词

cross the road safely 安全过马路

语法五：交通与安全常用短语

look left and right 左右看

wait for the green man 等候绿灯

get on the bus 上公交车

get off the bus 下公交车

专项练习（共100分）

一、用所给词适当形式填空（15分）

1. We should cross the road ________ (safe).

2. You should stay ________ (safe).

3. ________ (not run) on the busy road.

4. Everyone ________ (should) follow the rules.

5. You should ________ (look) left first.

二、选用 should / shouldn’t 完成句子（15分）

1. You ________ play football on the road. It’s dangerous.

2. We ________ wait for the green light.

3. Drivers ________ drive too fast in the street.

4. You ________ listen carefully in the safety class.

5. We ________ keep our hands away from hot water.

三、句型转换（每空一词）（15分）

1. You should walk slowly.（改为否定句）

You ________ walk slowly.

2. You should play near fires.（改为否定句）

You ________ play near fires.

3. Should I clean the classroom now?（作肯定回答）

Yes, ________ ________.

4. You should look left and right.（改为一般疑问句）

________ ________ look left and right?

5. Don’t swim in the river.（用shouldn’t改写）

You ________ ________ in the river.

四、句子改错（直接写出正确完整句子）（15分）

1. You shouldn’t runs on the road.

________________________________________

2. We should cross the road safe.

________________________________________

3. Should I to go now?

________________________________________

4. Don’t plays with matches.

________________________________________

5. He should waits for the green man.

________________________________________

五、匹配句子，选择恰当答句（5分）

(   ) 1. Should I go home now?

(   ) 2. Don’t touch the hot pot.

(   ) 3. How can we cross the road safely?

(   ) 4. What should we do on the bus?

(   ) 5. Should we wait for the green light?

A. We should sit quietly.

B. Yes, you should.

C. OK. I won’t.

D. We should look left and right.

E. Yes, we should.

六、选词填空（cross / across; safe / safely）（15分）

1. Please ________ the street with your parents.