Unit 1 语法不定式作表语精讲精练课件-2022-2023学年高中英语人教版（2019）选择性必修第三册

He turned the key quickly. The leaves on the tree turned yellow . 他快速地转动了那把钥匙。 树叶变黄。 turned翻译为“转动”是及物实义动词,所以其后面的the key就是宾语; turn翻译为“变化”是系动词,所以其后面的yellow就是表语。 (表语通常位于系动词之后) 常见的系动词 be:am/is/are; 感官类:feel/look/sound/smell/taste; 变化类: become/turn/get/grow; 维持现状类: keep/remain; 好像类: seem/appear; 动词不定式:to do 主动式:(not)to do 被动式:(not)to be done 1.My suggestion is to carry out the plan immediately. 2.What I would suggest is not to put off the meeting. 3. Water must be pure if it is to be drunk. 4. All of his personal stuffs are not to be sold. 不定式作表语的句型结构: 主动语态: 主语+系动词+ (not) to do 被动语态: 主语+系动词+ (not )to be done 1.My goal in the term is to improve my English. 2.Her dream is to be admitted by a key university. 3.What I want to do now is to express my thanks for you to offer me the job. 4.The purpose of new technologies is to make life easier, not to make it more difficult . 一.动词不定式作表语,表示主语的内容和目的 主语常常是表示意向、打算、计划、任务的词,或者what引导的从句等。 (wish, idea, task, purpose, duty, dream, aim, goal, intention, hope, plan, ambition, decision) 注意一: 不定式在作表语时,当前面的主语中有do的某种形式时,作表语的不定式可以省略to。(主语有do,后省to) 1. What you should do next is (to) help him with his English. 2.The only thing he can do now is (to) give up the plan. 注意二: 不定式在作表语时,有些词可用主动形式(to do)表示被动意义。 1. She is to blame. 2.A great deal is yet to do. 3. The house is to rent. 她应该受到责备。 还有许多事要做。 此房出租。 1.President Biden is to visit our country tomorrow . 2.Children are not to smoke . 3. You must be patient and persistent if you are to succeed. 4.If you don’t study hard, you are to be a loser. 二. 动词不定式作表语,表示安排/命令/禁止/意愿/注定发生。 1.To see is to believe. 2. To live is to learn, to learn is to better live. 3.To work is to earn a living 4. To be kind to the enemy is to be cruel to the people. 三. 动词不定式作表语,平行结构. to do + be + to do (主语是条件;表语是结果) 四. 主语+系动词+疑问词+ to do (疑问词+ to do也可以作表语) Our difficulty is where to find a guide. 五: 主语+Be + for sb + to do (主语:是to do 的逻辑宾语; Sb:是to do的逻辑主语) This form is for you to fill (in). 1. The motto of the little boy who was su