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课件网) Unit 4 Exploring poetry Grammar and usage Learning Objectives Learning Objectives Master the relevant knowledge points of non-finite verbs through discourses and exercises. Learn about "Romantic poetry and poets" by reading articles, feel the charm of poetry, and improve poetry appreciation ability. Systematically grasp the basic forms of non-finite verbs and correctly use appropriate non-finite verbs in specific contexts. Key Points and Difficult Points Key points: Master the relevant knowledge points of non-finite verbs through discourses and exercises. Difficult Points: Systematically grasp the basic forms of non-finite verbs and correctly use appropriate non-finite verbs in specific contexts. Lead-in What are the main types of non-finite verbs What can to-infinitives, verb-ing and verb-ed forms be used as in a sentence To-infinitives, verb-ing and verb-ed forms. They can be used as subject, predicative, object, attributive, adverbial and complement. Grammar and usage 1.什么是非谓语动词？ 非谓语动词首先是一种动词形式，其次是这种动词形式不能单独做谓语 非谓语动词通常指to do、doing 和done 非谓语动词 意义 相同点 to do doing done 目的、将来、结果 主动、进行、修饰物 被动、完成、修饰人 1）有固定搭配 2）可以作表语、定语、状语、补语 2.非谓语动词在什么条件下使用？ 一个句子当中，已经存在一个主句（谓语动词）, 又没有连词的情况下, 还有别的动词出现时。 非谓语动词 She got off the bus, (leave) her handbag on her seat. She got off the bus, but (leave) her handbag on her seat. left leaving 3.谓语动词的功能 非谓语动词 形式 功能 主语 宾语 表语 定语 状语 补语 To do 动词-ing 动词-ed 非谓语动词没有人称和数的变化，但有时态和语态的变化。 The car to be bought is for his sister. She pretended to be reading when the teacher came into the classroom. Tips 非谓语作主语 To do 和doing形式都可以用作_____，有时可用_____ 代替，此时主语置于_____ 。 →It will be dangerous to play with fire . To do & doing Pretending to know what you do not know is no good. → It is no good pretending to know what you do not know. To play with fire will be dangerous. 主语 形式主语it 句末 It is a shame to litter. It is necessary for us to protect the earth for the future generations. It is very kind of you to help with my English. It took the Chinese a long time to explore the space. It makes me relaxed to know that I have passed the exam. it 作为形式主语时，常见句型。 It + be + n. + to do sth It + be +adj. + ( for sb) to do sth ( adj 修饰物） It + be +adj. + ( of sb) to do sth ( adj 修饰人） It takes (sb) time/money to do sth It makes sb +adj. + to do sth To do It is worthwhile doing... 做......是值得的 It is _____/_____ doing... 做......无用的 It is _____ doing ... 做......是没有好处的 It is _____ ... 做......是浪费时间的 no use useless no good a waste of time doing Observe the following sentences and guess the differences. Smoking is forbidden here. Collecting stamps is his hobby. Teaching children music is her work. Driving a car du ... ...
