中考英语动词不定式精品课件（共31张PPT）

动词不定式 的构成： (not) to+do(动词原形) A ‘to’-infinitive can be used as… 主语（Subject） 表语（Predicative） 宾语（Object） 宾补（Object complement） 定语（Attributive） 状语（Adverbial） Ⅰ 不定式用作主语 To grow trees is very important. It is very important to grow trees. 不定式作主语时,往往放在谓语之后,用it作形式主语。 Say in another way, using ‘it’. To learn from your friends is important. To leave without saying goodbye is impolite. To chat with Miss White is a pleasant thing. To walk to school takes me ten minutes. It is important to learn from your friends. It is impolite to leave without saying goodbye. It is a pleasant thing to chat with Miss White. It takes me ten minutes to walk to school. It is + adj. + for sb. to do… ≠ sb. is\are +adj. +to do… It is + adj. + of sb. to do… = sb. is\are +adj. +to do… 你那样做是有礼貌的。 It is polite of you to do that. = You are polite to do that. (good, kind, nice, rude, clever, right, silly, thoughtful, brave, selfish…) (easy, hard, difficult, important, possible, necessary