1、1Unit 3 Could you please clean your room单元语法专练情态动词 could 的用法1.情态动词 could 表示礼貌地提出要求。Could you (please) do.?/Could you do.,please?意为“请你做好吗?”,表示请求对方做某事。表示否定意义时,用“Could you please not do.?”意为“请不要做好吗?”肯定回答为“Yes,sure./Sure./Of course./No problem.”。否定回答为“Sorry./No,I cant.”,其后一般委婉地加上原因。例如:Could you please c
2、lean your room?请你打扫一下房间好吗?Yes,sure.好的,当然。Could you sweep the floor,please?请你把地扫一下好吗?Sorry.I have to finish my drawing.对不起。我必须完成我的画。2.情态动词 could 表示委婉地请求许可。Could I.?意为“我可以吗?”,表示请求对方允许自己做某事。肯定回答为“Yes,you can./Sure./Of course.”。否定回答为“Sorry./Im afraid not./Im sorry you cant.”。例如:Could I use your computer
3、?我能用一下你的电脑吗?Sorry.Im working on it.对不起。我正在用。3.情态动词 could 作为 can 的过去式时,不表示委婉语气,而表示过去的能力或可能性,对其一般疑问句的回答仍可用 could。例如:The boy could read when he was five years old.这个男孩 5 岁时就能看书了。2.单项填空(A)1.Could you please your bedroom,Peter?Your mom will be back soon. A.sweep B.sweepingC.to sweep D.sweeps(A)2.Could yo
4、u please TV now?Im studying for my test. A.not watch B.not to watchC.dont watch D.cant watch(B)3.Could you go to see the new movie with me now?Sorry,I .Look,its time for me to watch Readers on CCTV. A.can B.cantC.neednt D.must(D)4.Could I go out with Jack tonight? .You have to stay home. A.Yes,you c
5、ould B.Yes,you canC.Sorry,you can D.No,you cant(C)5.Could I invite my friends to the party on Saturday,Mom?Of course you .That sounds like fun. A.may B.could C.can D.must.用 can 或 could 的适当形式填空,每空一词1.He is sad he cant run any more because of his illness. 2.Could he wash his clothes by himself when he
6、 was young?Yes,he could . 3.The little girl couldnt walk when she was two years old. 4.Could I ask you some questions?Yes,you can . 3.根据汉语意思完成句子,每空一词1.你能把电视关上吗?Could you please turn off the TV? 2.我今晚可以在外面待到 9 点吗?Could I stay out until 9:00 tonight? 3.我今晚能出去和朋友散步吗?当然,那应该没问题。 Could I go out for a walk with my friends this evening? Sure ,that should be OK. 4.你能把书递给我吗?当然。Could you pass me the book? Yes, sure . 5.我可以借你的电脑吗?对不起。我不能把电脑借给你。Could I borrow your computer? Sorry.I cant lend it to you.
