“it”用法总结(经典版)课件.ppt

it 的用法;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: Zhengzhou 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. ;㈡.引导词it1. It is + 被强调部分 + that ...　 　 　; 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。 1) 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 oclock 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 oclock when we got home last night．我们昨晚到家时已十点了。2) It was at ten oclock that we got home last night．我们昨晚是在十点到家的。　　　;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. ;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， natural...) that ... that 后的从句中要用虚拟语气（should + 动词原形），should 可以省去，建议记住该句型中的形容词。 It is important that we (should) learn English well. 　　 ; 2）.It is +v-ed +that 从句 ① It is said (reported， learned....) that ...  据说（据报道，据悉．．．）“。 　　  It is said that he has come to Beijing. 　　 ②. It is suggested ( ordered / demanded/ insisted/ commanded... ) that ...  主句中的过去分词是表示请求，建议，命令等词时，that　后的从句要用虚拟语气（should + 动词原形），should 可以省；常译为“据建议；有命令．．．） 　 　 It is suggested that the meeting ( should ) be put off. 　;3）. It is a pity ( a shame ... )