L1语法课-It作形式主语常见句型

L1语法课-It作形式主语常见句型

2017-05-13    15'55''

主播: 启哲英语

69 4

介绍:
It作形式主语常见句型 1.It + be +形容词+ that-从句 可用于此句型的形容词有: wonderful, true,good,right,wrong,(un)important,useless,surprising,disturbing,frightening,alarming,clear,unusual,lucky,certain, necessary等。 如: ① It is quite certain that he will be at the meeting.他将出席会议是无疑的。 ② It is surprising that he came late to school this morning.他今天早上迟到真令人惊讶。 ③ It is important that we (should) study hard.我们努力学习是很重要的。 注意: 该句型中的形容词是(un)important, necessary等时,从句应为 (should )+动词原形。 It is important that we (should) learn English well. It is necessary that he (should) remember these words. 2.It + be +名词+ that-从句 适用该句型的名词(词组)有: a pity,an honor,a good thing,a fact,a surprise,a question, a shame,a custom, a truth,our hope, no wonder, good/bad manners等。如: ① It is a pity (that) you missed the sports meeting last week. 你错过了上周的运动会太可惜了。 ② It is a fact that English is being accepted as an international language. 事实上英语已经被作为一种国际语言而接受了。 3. It +seem/ appear/ happen的适当形式+that从句。 ① It seems that there is a big waste pipe coming down from the town. ②It appeared that he was calm, but inside his heart was beating wildly with fear. 4. It + be + 过去分词 + 主语从句,这类过去分词有:announced, believed, expected, hoped, decided, reported, said, shown等, 如: It is reported that 16 people were killed in the earthquake. It is not decided who will give the operation to the patient. 5. It is time ( about time ,high time ) that ... 该句型中that 后的从句应该用虚拟语气,值得注意的是① 常用过去时态表示虚拟.② 有时也用should + 动词原形,should 不能省。常译为"是(正是)...的时侯..."。 It is time that children should go to bed. = It is time that children went to bed. 6. It is the first ( second ... ) time that ... 用完成时态。至于用什么完成时态,由主句的谓语动词的时态决定。如果是一般现在时,后面从句用现在完成时态;如果是一般过去时,后面从句则用过去完成时态。该结构中 that 可以省去;it有时用 this 替换.常译为"是第一(二)...次..."。 It is the first time I have been here. = This is the first time I have been here. 7. It + be + adj./ n. (for sb. / of sb.) + to do sth. 该句型中的形容词通常是表示事物的特点或特征的如difficult,hard,easy,impossible,necessary,important等,此时用for;或表示人的性格特征或特点的如nice,good,bad,kind,silly,foolish,wise,clever, careless,rude,brave,cruel,careful, grateful等,这时要用 of。如: ① It is foolish of you to give up such a good chance. ② It is necessary for college students to master at least a foreign language.