八年级下册语法专题一：情态动词should与could .pdfVIP

专题归类复习一 情态动词 should 与 could 的用法 ● 语法讲解 1．should 是情态动词 shall 的过去式，但有时并不表示过去。 (1)表示委婉的劝告或建议，意为“应该”。如： You should hand in your composition at once. 你应该立刻交上你的作文。 (2)表示可能性或推断，意为“可能；应该”。如： I think they should be there now. 我想他们现在应该在那里。 (3)用于特殊疑问句中，表示意外、惊奇、不能理解等强烈感情。如： How should you know that? 你是怎么知道那件事的？ What should you do to relax? 你该做什么来放松呢？ 2 ．could 是情态动词 can 的过去式，但有时并不表示过去。 (1)表示提议，比 can 更客气、委婉。 I could do the shopping for you, if you are tired. 如果你累了，我能帮你买东西。 (2)表示请求，语气比 can 更客气、委婉。 Could you show me the way to the hospital? 你能告诉我去医院的路吗？ ● 语法精练 Ⅰ.单项选择 ( )1.Schools________allow students at least one hour a day for sports. A ．would　　　　 B ．might C ．should D ．could ( )2.________you tell me how to get to the post office? A ．Must B．Need C ．Could D ．Should ( )3.—When can I come for the photos? I need them tomorrow afternoon. —They________be ready by 12 ：00. A ．can B ．should C ．might D．need ( )4.—Could I borrow your dictionary? —Of course you________ ． A ．can B ．must C ．should D ．will ( )5.The basketball________his.He loves playing basketball. A ．maybe B．may be C ．may is D．may not ( )6.We________keep the new traffic law and learn how to protect ourselves. A ．will B ．would C ．shall D ．should ( )7.—Could you please help me do my homework? —Sorry.I________ ．You________do it by yourself. A ．could; may B ．couldn't; should C ．can't; should D ．can't; may ( )8.—How was the youth club last night, Mark? —It was great fun.You________come.