内容正文:
重难语法课(4)——非谓语动词
[语境中体悟用法]
朗读下面短文,体会、领悟加黑部分是哪类非谓语动词,在句中作什么成分。
Good afternoon, Ladies and gentlemen. It is a great honor for me to introduce① this English speech contest. As we all know, to master② a foreign language is very important for us. Taking part in③ an English speech contest is a helpful way to learn④ English. Everyone wants to show⑤ their best. When we have been preparing for it, we can improve our listening and speaking⑥ ability, developing⑦ a good habit of learning⑧ English.
In the process of the competition, you should pay attention to the rules made⑨ by us. First, you should make your voice heard⑩ clearly by everyone, so reading aloud⑪ is very necessary. Second, you should try your best to express⑫ yourself in English fluently. Finally, you should finish your speech in five minutes.
I am sure the English speech competition will be a great success and the audience will feel satisfied⑬ with our performance. Thank you!
[用法体悟]
①to introduce this English speech contest是不定式短语作真正的主语,it是形式主语。
②to master a foreign language是不定式短语作主语。
③Taking part ... speech contest是动名词短语作主语。
④to learn English是不定式短语作定语,修饰way。
⑤to show their best是不定式短语作宾语。
⑥listening and speaking是动名词作定语,修饰ability,表示类别。
⑦developing ... learning English是现在分词短语作状语。
⑧learning English是动名词短语作介词of的宾语。
⑨made by us是过去分词短语作后置定语。
⑩heard ... everyone是过去分词短语作宾语补足语。
⑪reading aloud是动名词短语作主语。
⑫to express yourself in English fluently是不定式短语作目的状语。
⑬satisfied是形容词,作表语,意为“感到满意的”。
[系统中整合规则]
非谓语动词包括动词不定式、动名词和分词(现在分词与过去分词)。
(一)动词不定式的用法及构成
不定式由“to+动词原形”构成,其否定形式是“not to+动词原形”。不定式可以加宾语或状语构成不定式短语,它没有人称和数的变化,但有时态和语态的变化。动词不定式在句中可以作主语、宾语、表语、宾语补足语、定语和状语。
1.作主语
不定式短语作主语时,往往用it作形式主语,常用句式:It is/was+adj.+for/of sb. to do sth.。
To see is to believe.眼见为实。
It is important for us to live a low carbon life.
过一种低碳生活对我们来说很重要。
2.作宾语
(1)下列动词只能用不定式作宾语,请牢记下面的口诀:
决心学会想希望,拒绝设法愿假装
decide/determine, learn, want, expect/hope/wish; refuse, manage, care, pretend
主动答应选计划,同意请求帮一帮
offer, promise, choose, plan; agree, ask/beg, help
(2)在某些动词如find, thi