高中英语语法中It用法及其句型和固定搭配讲解

　　It用法及其句型和固定搭配讲解

　　三、It作主语的句型

　　1. It takes sb. to do（=sb takesto do）某人用多长时间做某事

　　例 It took the men a week to mend our roof.（= The men took a week to mend our roof.）

　　2. It's（just）（un）like sb. to do（不）像某人做某事的'风格

　　例 It was（just）like him to think of helping us.

　　3. It's（about/high）time that should /v-ed是该做某事的时候了

　　例 It's（about/high）time that we should take action.

　　4. It's the x-th time（that） have v-ed第几次做某事了

　　例 It's the third time that he has failed the driving test.

　　5. It is/has been since continuous v-ed（延续性动词）某动作已有多长时间不发生了

　　例 It's 10 years that he lived here

　　6. It was（not） before过（不）了多长时间某动作发生了

　　例 It was not long before they arrived.

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