情态动词跟情态动词的被动语态.ppt

含情态动词的被动语态 * 情态动词有哪些? can /may/must/ will / shall / should / ought to need /dare had better/ would rather, used to / have to / be able to * 情态动词的含义 序号 原形 过去式 主要含义 1 can could 2 may might 3 must must had to 4 need needed 5 dare dared 6 will would 7 shall should 1.能力2.请求/准许3.可能性 1.请求/准许2.可能性 *3.祝愿 1.义务(必须); 2.猜测(肯定) 需要 敢 愿意 1.征求意见 2“应该”(should) * 序号 原形 过去式 主要用法 8 be able to was/were able to 9 have to had to 10 ought to ought to 11 used to 12 had better 13 would rather “能够”（能力） “不得不/必须” “应该” “ 过去（常常）” “最好” “ 宁愿” 情态动词的含义 can/could be done must be done should be done may/might be done had better be done have to be done 含情态动词的被动语态： 情态动词+be +PP 否定式：情态动词+not + be + p.p can/could not be done must not be done should not be done may/might not be done had better not be done have not to be done 疑问式：情态动词+ 主语+ be + p.p can/could +主语 +be done must +主语 + be done should +主语 + be done may/might +主语 + be done had +主语 + better be done have +主语 + to be done 1.I can finish the work. The work can be finished by me. Can the work be finished by you? 2.We should plant many more trees. Many more trees should be planted by us. Should many more trees be planted by us? Teenagers should be allowed by parents to drive the car . 3.Parents should allow teenagers to drive the car. Should teenagers be allowed by parents to drive the car ? 4.You can pass the exam if you study hard. The exam can be passed (by you) if you study hard. Can the exam be passed (by you) if you study hard? water(浇水) Trees must be watered by them every day. They must water trees every day. Must trees be watered by them every day? People may catch fish in the river. Fish may be caught in the river (by people). 1.My mother can cook delicious meals. Delicious meals can be cooked by my mother. 2. Students will use these textbooks next term. These textbooks will be used next term by students . 3. You should water trees often . Trees should be watered by you often . 4.You must not plant tre