初三英语语法复习情态动词行为动词PPT课件.ppt

;11;情态动词;Introduction;can 表示请求，允许，现在的能力和猜测。; could 表示比can更客气的请求,把握不大的猜测。还可能表示过去的能力,但不指已经做过的某事的能力。;Choose the right answer;1) I _________(shall/will) see you tomorrow. 2) We ________(shall/will) go to Century Park this Sunday. ;tidily;a noise in the library;情态动词should一般不应被认为是shall的过去式， 其主要用法如下：;2.用于表示推测的词，意谓“可能”。如：They should arrive soon. 3. shall 的过去时态, 如：We asked if we should help her.;Medicine for Mr Lee;Medicine for Ms Jones;Medicine for Mr Collins;★ ought to 后接动词原形，表责任或义务，译为“应该，应当”.;We must /mustn’t …;must/have to的主要用法;eg. ---Must I go tomorrow? ---Yes, _________________. / No, you ____________________.;1.现在式为have (第三人称单数用has) to eg. My parents have to go to church on Sundays. My uncle has to start work at 8am. 2. 过去式为had to eg. We had to pay 5 yuan for the book. Did he have to come back last night? 3. 将来式 will/shall have to 4. 完成式为have/has/had had to;1;3;S1:;I ________ have a meeting tomorrow afternoon.;eg. 1) I need to buy eggs every week. 2) He needs to take the medicine three times a day. 3) Mary needed to come yesterday. 4) Does she need to take her raincoat?;eg. 1) He needn’t go to the party this evening . 2) Need he go out for dinner?; eg. 1) My mum needs some milk and bread. 2）My mum doesn’t need any milk and bread.;eg. Need he tell you what to do? 疑问句的否定回答：No, you needn’t. 疑问句的肯定 回答： Yes, you must.;12;行为动词;英语中动词可以分为：实意动词和非实意动词。 一般实意动词，也称为行为动词。 行为动词可以分为及物动词和不及物动词，可以单 独作谓语。 非行为动词包括各类助动词，如情态动词，系动词 和do，did等等，不能独立构成谓语。 比如：hit是实意动词，因为“打”是作为一个真实动 作而存在，must，can等不是实意动词，本身并没 有真实的动作存在，要加上实意动词后才能构成谓 语。;一般,根据不同时态，行为动词相应地在肯定，否定和疑问句中要与be动词，do/does/did，have/has等助动词连用。;情态动词 （Modal verbs）