Unit 4 Space Exploration Discovering useful structures（动词不定式用法学案+课件+填空练习）-2021-2022学年高一英语精美课件+精美教案（必修三）（人教版2019）

2019人教版必修三Unit4 Space Exploration Discovering useful structures 动词不定式用法学案 (学生版) 云南省曲靖市第一中学 周昆林 原创制作 一、动词不定式作宾语 如下动词常接动词不定式作宾语 decide//determine/afford/expect/want/wish/desire/ask/promise/fail/refuse/seem/aim/agree/manage/happen/offer/plan e.g. He agreed to come to the party but has not turned up yet. 动词不定式一般式表示该动作发生在谓语动词agreed之后。 When I walked into the classroom, she pretended to be reading. 动词不定式进行时表示该动作与谓语动词同时发生并且正在进行。 She seemed to have travelled a lot in Europe. 动词不定式完成式表示该动作发生在谓语动词之前。 练一练 It remains___________ whether it will do us harm or good. (see) Several things remain ____________ this afternoon. (do) I wish ____________ for what I have done. (excuse) I am sorry _____________ you so much trouble. (give) She seems ______________ a cold last night. (catch) You appear _______________ a lot in the USA. (travel) I am sorry _____________ you waiting for a long time. (keep) She happened _______________ in the forest when a shot was heard. (walk) Great changes seem ____________ place everywhere every day in China. (take) 2、 不定式作主语 表示具体的、一次性的、未作的行为与动作，有时等同于动词的 V-ing作主语。 To see is to believe. = Seeing is believing. 眼见为实。 For him to admit his mistake is not easy. To have known you is a great honor. 动词不定式作主语经常用it作为形式主语，真正的作为主语的动词不定式摆后面以使句子均衡。 It is difficult ________ him to finish the task in one day. It is rude ___________ him to say in such a way. 形容词描述of 后的逻辑主语的性格、品质特征、态度等 如：good/kind/nice/polite/clever/foolish/stupid/silly//wrong/right/careless/careful/lazy，其它情况下介词一般用for。 练一练 It is very kind _______ you to look after my kid while I am away. It is difficult _________ the students to master a foreign language in such a short time. It is rude _________ him to say such words to her. It is foolish ___________ her to go there alone at night. It is necessary _________ the students to obey the rules. It is wrong _________ them to play jokes on you. 特殊疑问词之后常接动词不定式，不能接动词V-ing