It作形式主语讲解doc.ppt

;;It作形式主语讲解doc;It is easy to become addicted to smoking . it is no good crying over spilt milk. (覆水难收) It is amazing that at my age I am still fit . ;It作形式主语讲解doc;It作形式主语讲解doc;b、It+ be +adj+of sb to do sth 该句型中的adj通常用来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等时，要用 of。意为某人做某事,某人是... eg:It is foolish of you to give up such a good chance. ;It作形式主语讲解doc;It作形式主语讲解doc;It作形式主语讲解doc; 1、It is time +that sb. +v-ed/ should do 1、It is time +that sb. +v-ed/ should do eg. It’s time that you went to bed =It’s time that you should go to bed. 2、It’s necessary/ impossible/ important/ natural that sb. (should) do eg. It’s important that we (should) keep the balance of nature. ;It作形式主语讲解doc;It作形式主语讲解doc;注意： 如果主句中的过去分词是表示请求，建议，命令等词如：suggested/ordered/demanded... 等时 that后的从句要用虚拟语（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. 　  It was ordered that we ( should ) arrive there in two hours. ; 3. It + be + 名词词组 + that从句 这类名词有：a fact, a pity, a shame, an honour，a question等，如： eg: 1、It’s common knowledge that people cann’t live without water . 2、It’s a pity that you missed the exciting football match. 注意：如若表示出乎意料之意时,从句一般用虚拟语气常译为“竟然”。没有这种意义时，则不用虚拟语气。  eg:It is a pity that such a good thing ( should ) happen in your class. ;4、 It + 不及物动词 + 主语从句 这类不及物动词有：appear/seem/happen等译为“好像.../碰巧…/如： It seemed that he didn’t tell the truth. It happened that I was out when he called.;It作形式主语讲解doc;It作形式主语讲解doc