it句型总结报告.ppt

It构成的句型小结 一、 It作形式主语的句型 为使句子平衡，往往把it置于句首作形式主语，而把真正的主语（通常是不定式 短语、动名词短语或主语从句）移至句末。It 作形式主语的句型有： ㈠ it 代指不定式短语的句型 1. It takes + (sb.) + sometime / some money + to do sth. 做某事花去某人多长时间Just a minute, it wont take me long to change.等一下,我很快就可以换好衣服。It takes five minutes to walk there.走到那里需要5分钟。It took me more than a year to learn to draw a beautiful horse in five minutes.我花了一年多时间才学会在5分钟内画出一匹好看的马来。It takes a lot of money to buy a house like that.买那样一幢房子需要很多钱。 课件 2. It takes + 名词 + (for sb.) to do sth. 某人做某事需要… … It took great imagination as well as patience for Annie to teach me to speak.对安妮来说，教我说话需要极大的信心和想象力。It takes time for them to prepare for the great changes that take place in space.他们需要很多时间准备应付太空中所发生的巨大变化。 3. It is + 形容词 + (for / of sb.) to do sth. 某人做某事是… …的常用于该句型的形容词比较多。for sb. 的句型 常用于表示事物的特征特点，表示客 观形式的形容词，如easy, difficult, hard, important, possible, impossible, comfortable, necessary, better等。of sb的句型一般用表示人物的性格，品德， 表示主观感情或态度的形容词，如kind, nice, stupid, rude, clever, foolish, thoughtful, thoughtless, brave, considerate(考虑周到的), silly, selfish(自私的) 等。It was not right for the south to break away from the union.南方脱离联邦是不对的。It was kind of you to help us.谢谢你对我们的帮助。It is getting harder every day for a lazy man to get a living.懒汉谋生是越来越困难了。It’s very good of you to have listened to me.感谢你能听我讲。It’s very thoughtful and kind of you to offer me this lovely holiday.你能给我这么美好的假日，实在是想得太周到、太友善了。 课件 4. It is + 名词 + to do sth. 做某事是… …的 常用于该句型的名词有：manners, duty, fun, good, a great honour, the first, the next, the last, the best, too much, too little, not enough等。As a student, it is bad manners to come late to class.作为学生，上课迟到是没有礼貌的。It is our duty to pay taxes to our government.向政府交税是我们的义务。 5. It is + one’s turn + to do sth. 轮到某人做某事 It was my turn to clean the blackboard.轮到我擦黑板了。 6. It is + up to sb. + to do sth. 做某事是某人的责任或义务It’s up to us to give them all the help we can.我们理应竭尽所能地给予他们帮助。 课件 ㈡ it 代指动名词短语的句型 1. It is + 名词