高中英语-语法-It 用法.ppt

* 一.It 在特定句型中的运用 1.It was /will be long (one week/ two years…)+before “很久（一周/两年后……）才……。如 很久以后他才回来。 It was long before he came back. 不久我们就又会见面 It will not be long before we meet again. 2.It is /has been /was + some time + since从句 “自从…以来已经有多长时间了”。如 中华人民共和国成立已经有五十多年了 It is/has been more than fifty years since the People’s Republic of China was founded 他生病已经有三天了 It was three days since he had fallen ill. 注意 1）如果since从句中的谓语动词为延续性动词时， 应译为“自从不…以来已经有多长时间了”.如 It is / has been seven years since I taught in this school. 2) 时态的把握：如果主句运用的是一般现在时， 或现在完成时，那么since引导的从句用一般 过去时；如果主句运用的是一般过去时，那么 since引导的从句常用过去完成时。 3.It + be + the + 序数词 +that 从句 “是某人第几次作某事了”。 这是我第一次公开发言 It is the first time that I’ve spoken in public. 注意 如果主句是一般现在时或一般将来时，从句用现在完成时； 如果主句是一般过去时，从句用过去完成时。 4.It + be +具体时间 +when… “当某事发生时，时间是在……”。 It was 11 when they arrived at the factory. 他们到达工厂时是11点 比较 1）It will be July 1 ___ we meet again. A. since B. that C. before D. when It is on July 1 ___ we will meet again. A. since B. that C. before D. when D B 5.It + be + (high/about) +time that 从句 “早就该有某事或做某事了” 你可别再游手好闲了，也该找份工作了吧。 It’s high time that you stopped fooling around and started looking for a job. 注意 该句型that 从句中谓语动词多用一般过去时 二.It 的特殊用法 1.make it “成功；做到；赶上 The train is due to leave in five minutes– we will never make it （赶上） You can’t make it to the other shore in this weather. 2) “规定时间” --Shall we meet next week？ --Yes. Let’s make it next Sunday. 2. see to it that …注意；留神；负责 See to it that everything is ready. 3. as it is “事实上” I thought he would get better, but as it is he is getting worse. 我认为他会好转，但事实上他一直在恶化。 2）“照原样” Leave the chair as it is. 4.as it were 可以说；在某种程度上 He is , as it were , a walking dictionary. 它好比是一本活字典 1.I have a colour TV set. I want to sell ____. A. one B. the one C. that D.