Itis句型.pptx

Its important for you to study hard.这里的这里的it是形是形式主语，那么式主语，那么真正的主语是真正的主语是什么呢？什么呢？It 不是代词么？什不是代词么？什么是形式主语啊？么是形式主语啊？了解“It”作形式主语的含义了解“Its+adj.+（of/for sb）to do sth.”句式的形态特征了解“Its+adj.+(of/for sb）to do sth.”句式的功能辨别该句式中of/for的使用Find the subject（主语）in the following sentences.The website takes you to different places around the world.Sydney is the largest city in Australia.We went to a seafood restaurant on the fifth day.主语表明这句话说的是谁和什么，一般位于句首。Its important for you to study hard.虽为主语，但无实际意思。“形式主语”“真实主语”To study hard is important for you.避免避免“头重脚轻头重脚轻”Its+adj.+to do sth.sad,necessary,important,wrong,possible,hard,difficult,easy,good,impolite描述对某一事情的看法或感觉怎样的形容词It is _ to give seats to the elderly on the bus.polite It is _ to do voluntary work.meaningful 1.The Reading Club is fun to join.2.To finish the work within an hour is difficult.3.This question is easy to answer.Rewrite the following sentences:It is+adjective+to+doIt is difficult to finish the work within an hour.It is easy to answer this question.It is fun to join the Reading Club.We should help the disabled climb up the steps.It is good.We should take good care of the old.It is important.We should help the homeless build their homes.It is kind.We should help the blind cross the road.It is helpful.1.Its good to help the disabled climb up the steps.2.Its important to take good care of the old.3.Its kind to help the homeless build their homes.4.Its helpful to help the blind cross the road.Rewrite the sentences.儿童学好礼仪是很重要的。你能帮我，真好。TranslationIts very important to learn good manners.for childrenIts very kind to help me.of youIts+adj.+of sb.+to do sth.Its+adj.+for sb.+to do sth.用介词for或of 引出动作描述对象It is nice _you to help me do this job.It is good _you to do morning exercises.offor用介词for或of 引出对象什么时候用什么时候用of,何时何时用用for呢？呢？Can we use both？The key is to understand the adj.当形容词修饰人时，用介词ofofforIt is nice _you to help me do this job.It is good _you to do morning exercises.当形容词修饰不定式的动作时，用介词forD-Did you feel_was selfish of James to hide the comic books?-Yes.It is important _a boy to learn to share.A.that;of B.that;for C.it;of D.it;forIt is necessary _ people to keep our city clean.for It is impolite _them to drop littler everywhere.of Its polite _him to queue for his turn.of for sb.to do sth.of sb.to do sth.It is+adj.+to do sth.We can use the structures to express our feelings and opinions.Tips为避为避“头重和脚轻头重和脚轻”形式主语形式主语itit来充当来充当;真实主语不定式真实主语不定式;句型旨在表观点句型旨在表观点;引出对象引出对象of of 或是或是for;for;修饰人物就用修饰人物就用ofof；修饰动作行为就用修饰动作行为就用forfor。