［误］We have two hours to kill before we will go home. ［正］We have two hours to kill before we go home. ［析］kill time意为“消磨时光”。 英语状语从句中要用一般现在时表示将来的动作。如：If it rains we will not go to the park. ［误］I did this work two days before. ［正］I did this work two days ago. ［析］用ago组成的时间状语其主句中的谓语动词要用过去时，而before引起的时间状语其主句中的谓语动词多用完成时，如：I has done this work a few days before. before, long, long before before long是“不久”之意，例如：I shall go to America before long. 而long before则是“很久很久”之意，如：We knew this teacher long before we saw him. （我们在看到这位老师之前很久就知道他了。）
不错哦 8. begin ［误］The meeting will begin from Monday. ［正］The meeting will begin on Monday. ［误］The film has begun for ten minutes. ［正］The film has been on for ten minutes. ［析］begin是瞬间动词，所以它的完成时态不能接表示一段时间的状语，如：The film has begun. 这句话是对的，即“电影已经开始”。但要讲已经开始10分钟了则要用has been on即“上演了10分钟”。 begin, start begin与start两词后面加不定式或动名词都可以，且意思并无区别，但在表达习惯时接动名词的用法较多，如：How old were you when you first started learning English?但这两个词的进行时态中则多用不定式，如：I was beginning to get hungry. 但如果句子的主语是物而不是人，则多用不定式，如：The ice began to melt. It started to get dark before we got to school. 当动词是表达某种心理状态时，要用不定式，如：The student began to understand his mistakes. ［误］They study hard in the class from the beginning to the end. ［正］They study hard in the class from beginning to end. ［析］from beginning to end是习惯用法，即自始至终，不要加冠词，但如单独使用则要加冠词，例如：At the beginning, the teacher gave us an exam. 9. behind ［误］He missed the class because he was behind the time. ［正］He missed the class because he was behind time. ［析］behind time一短语意为“晚了”，而behind the times意为“落后于时代”。behind是介词同时又是副词，如Come out from behind the door（介词）. He's a long way behind（副词）. He fell behind with his classmates（副词）. 10. below ［误］What's that below the chair. ［正］What's that under the chair. ［析］under意为“正下方”，而below意为“比……低”，或指“在下游”。如：There is a fall below the river. （河的下游有一个瀑布。）其反义词为over，如：There is a big plane flying over the city. 但在“下面的例子”一表达语中则要用the example below, 而不要用under.
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