“it”用法总结(经典版) [全国通用].pptVIP

㈠ 1.it作人称代词 1.1.it的最基本用法是作人称代词，主要指刚提到 的事物，以避免重复: Ningbo is a beautiful city, isn’t it? 1.2.也可以指动物或婴儿(未知性别的婴儿或孩子): Is this your dog？No, it isn’t. 1.3.也可指抽象事物: It was a great surprise to me when he did a thing like that． 2.非人称代词it it有时并不指具体的东西，而泛指天气、时间、环境等，称为非人称的it： 2.1.指天气： It is a lovely day, isn’t it?It is a bit windy. 2.2.指时间:It was nearly midnight when she came back. 2.3.指环境:It was very quiet in the café. 2.4.指距离： It is half an hour’s walk to the city centre.  ㈡.引导词it1. It is + 被强调部分 + that ...　 　 　 使用该句型有以下几点请注意：① 强调句的谓语is或was永远用单数. 　　　　 It was yesterday that I met your father in the street． ②不管被强调部分是哪种状语，只能用that连接，不得使用where、when等连词. It was in the street that I met your father yesterday． ③被强调部分为人时，可用who(主格或宾格)和whom(宾格)代替that，用that也行。 It was your father that/whom /who I met in the street yesterday． 2) It was I that/who met your father in the street yesterday． ④强调句中 也要注意主谓一致、人称一致和否定转移的问题。 It is they who are our friends． It was not until ten o'clock that we got home last night． ⑤注意不要混淆强调句和其他从句。It is was…that…为强调句标志，去掉后仍可组成一个完整的句子，只是没被强调,而其他从句一般不具备这一特征。比较： 1) It was ten o'clock when we got home last night．我们昨晚到家时已十点了。2) It was at ten o'clock that we got home last night．我们昨晚是在十点到家的。　　　 要点点拔 　第一句不是强调句，when不可改为that,因为去掉it was和that后，只能组成“We got home ten o'clock last night．”这样一个不完整的句子；第二句是强调句，that不可改为when． 2. It is not until + 被强调部分 + that ... 该句型也是强调句型。主要用于强凋时间状语，译成汉语＂直到．．．才．．．＂，可以说是 not ... until ... 的强调形式。 It was not until she took off her dark glasses that I realized she was a famous film star. = Not until she took off her dark glasses did I realize she was a famous film star. = I didn’t realize she was a famous film star until she took off her dark glasses. 3. it 用作形式主语 3.1 代替主语从句 1）It is + adj. +that从句 ① It is clear ( obvious， true， possible certain....) that ..... “清楚（显然，真的，肯定．．．）”　 It is very clear that he’s round and tall like a tree. ②. It is important ( necessary， right， strange， na