《总复习-情态动词cancould.ppt》由会员分享，可在线阅读，更多相关《总复习-情态动词cancould.ppt（9页珍藏版）》请在三一办公上搜索。
1、总复习,情态动词,情态动词（Modal Verbs）,情态动词本身有一定的意义但不完整，因此不能在句子中独立作谓语，只能和动词原形一起构成谓语，即：情态动词+动词原形，表示说话人对某一动作或状态的语气或态度。情态动词通常没有人称和数的变化。,1.must“必须，应该”,否定式 must not=mustnt“不许、不准”2.have to“不得不，必须”,有人称、数以及时态上的变化。3.should“应该，应当”，表示劝告、建议。否定式 should not=shouldnt“不应该”4.can 表示能力、许可或可能。作为情态动词，有时态但无人称变化，否定式是cannot=cant,过去式是c
2、ould,过去式的否定式是could not=couldnt.,Can/could,can 表示能力；could 用于一般过去时，表示过去的能力-Can you swim?-Yes,I can./No,I cant.When I was one years old,I couldnt walk.Now I can walk.can和could表示许可或请求许可，could语气更委婉客气，may比较正式。-Can I borrow this book?-Im sorry you cant.-Could you help me with my English?No problem.,选择疑问句,说
3、话者提出两个或两个以上的选项,让对方选择回答。其结构是：一般疑问句或特殊疑问句加选择部分，选择部分用or。朗读时，前面用升调，最后一个选项用降调。回答时，须选择回答，不能用yes或no回答。-Can you dance to disco or perform ballet?-I can perform ballet.-Which subject do you like best,English,Chinese or math?I like English best.,had better do sth.最好做某事had better not do sth.最好不要做某事=d better do
4、 sth.,()1.Lucy,can you draw?_ But I can sing Chinese songs.A.No,I cant.B.Yes,I cant.C.Yes,I can.()2.Mom,can I have more chocolates?_ You cant eat too much.A.Thats OK!B.No way!C.Yes,you can.()3._ Alice perform ballet two years ago?No,she _.But now she _.A.Can;cant;could B.Could;can;canC.Could;couldnt
5、;could D.Could;couldnt;can()4.Can you play ping-pong _ basketball?I can play ping-pong.A.and B.or C.but D.with,()5.I can play the guitar._ can you do?I can also sing English songs.A.Something else B.What else C.What()6.Can Bill _ the party?Of course,he can.A.comesB.comes to C.come to()7.Could you ri
6、de a bike when you were 5 years old?_ A.Yes,I could.B.Yes,I couldnt.C.Yes,I can.,()8.It is very cold outside.Youd better _ warm clothes.A.to wear B.wearC.wearing D.wears()9.Can you tell me the way to the bank?_ A.Yes,please.B.Sure.C.Dont ask me.()10.Can you speak English?_.But only _.A.No,I cant;littleB.Yes,I can;a little C.Yes,I can;a fewD.No,I cant;few,
