单元同步语法
情态动词could 的用法
情态动词有很多,它们往往用在请求别人帮助或征求别人意见的句子中。
有了它们的“加入”,句子的语气就会更客气、更委婉,could 就是其中一员。
下面来看看它的用法吧。
1.could 为can的过去式。
表示“过去的能力和可能性”,其肯定回答和否定回答都用could。
eg:
—Could you play basketball when you were 5 years old? 当你5岁时,你会打篮球吗?
—Yes, I could./No, I couldn’t. 是的,我会。
/不,我不会。
2.表示请求的问句。
could 可用于表示请求的问句中,其表现形式有两种:
(1)Could you (please)…? 常用于委婉地请求某人做某事,其后通常接动词原形。
could 是can的过去式,但在此句中不表示过去。
eg:
Could you please go with me? 你能和我一起去吗?
Could you please not eat in class? 课堂上你能不吃东西吗?
(2)Could I please…? 常用于委婉地请求别人允许自己做某事或提议,其后同样接动词原形。
eg: Could I please go camping with my friends next morning? 明天早上我能和朋友们去野营吗?
另外,表示礼貌请求的句型还有:
Would you like +sth./to do sth.?
May I +do sth.?
Shall we + do sth.?
Would you mind+sth. /doing sth.?
What/How about +sth. /doing sth.?
(3)表示请求的问句的回答。
could 表示请求时,其肯定回答和否定回答都不用could。
肯定回答为:Yes, you can./Sure./Of course./No problem./I’d love to./Certainly./Yes, please./It’s OK. /All right.
否定回答为:Sorry, I’m afraid not. /I’m sorry, you can’t./I’m sorry, but …/Of course not. eg:
—Could you please do the dishes? 请你洗洗盘子好吗?
—Sorry, I’m afraid not. I have to do my homework. 对不起,恐怕不行,我得做作业。
—Could I use your computer? 我可以用你的电脑吗?
—Certainly. 当然可以。
单元同步语法强化训练
Ⅰ.选用下面方框中的语句完成下面的对话。
B:______________ I’m too tired.
2.A:_____________ use the car?
B:_______________ Your father needs it.
3.A:______________ clean your bedroom?
B:______________ I’m too busy.
4.A:_______________ fold your clothes?
B:_______________ I will do that at once.
5.A:_______________ go to the movies?
B:__________________ And I’ll go with you.
Ⅱ.运用每一小题后的提示语回答下面的问题。
6.Q:Could you please clean your room?(Sorry/do the dishes)
A:_________________________________________ 7.Q:Could I please stay out late?(No/babysit your sister) A:____________________________________ 8.Q:Could you please make your bed?(Yes/sure)
A:____________________________________
9.Q:Could I please use your bicycle?(No/need it today) A:____________________________________
10.Q:Could you please take out the trash? (Sorry/practice the piano)
A:____________________________________
Ⅲ.根据汉语意思完成下列句子,每空一词。
11.—请你帮我学英语好吗?
—好的,当然可以。
—_________ you _________ help me with my English? —Yes,_________ .
12.—你把房间打扫一下好吗?
—对不起,我得做作业。
— ________you _______ ______ the room?
—Sorry, I________ . I have to do my homework. 13.—请问我能看电视吗?
—是的,你能。
—__________ I watch TV?
—Yes, you___________ .
14.—请问我能用一下你的自行车吗?
—不,你不能。
我得骑车外出。
—_______ I _______ your bike?
—No, you ________. I have to go out.
15.—当你4岁时,你会唱英语歌吗?
—不能。
—______ _______ _____ English songs when you were four years old?
—________, I ________.
16.—我能在这儿吸烟吗?
—对不起,你不能。
— _______ _______ smoke here?
—_______ ________ , you can’t.
17.请递给我那本书好吗?
________ _______ ______ ______me that book?
单元同步语法强化训练
Ⅰ.1.Could you please; Sorry, I can’t. 2.Could I please; No, you can’t.
3.Could you please; Sorry, I can’t.
4.Could you please; Yes, sure.
5.Could I please; Yes, you can.
Ⅱ.6.Sorry, I can’t. I have to do the dishes.
7.No, you can’t. You must babysit your sister.
8.Yes, sure. 9.No, you can’t. I need it today.
10.Sorry, I can’t. I have to practice the piano.
Ⅲ.11.Could;please;sure
12.Could;please clea n;can’t
13.Could;can
14.Can;use;can’t
15.Could you sing;No;couldn’t
16.Could I;I’m sorry
17.Could you please pass。