【—辅导之时间词】关于时间词的用法，老师做下面的讲解学习。

　　时间词用法

　　later / after / ago / before: 1later“…时间后”结构：时间段+later

　　常用于一般过去时。They went to Beijing five days later.

　　(later前无时间段，单独在句尾，常用于将来时：I’ll see you later.)

　　2after“…时间后”结构：after+时间段，常用于一般过去时，和1相同。

　　They went to Beijing after five days. The dog died after a week.

　　(after也可加句子, 但主句不一定用一般过去时：I’ll send you an e-mail after I get home.

　　Return it to me after you finish it. 见2.)

　　3ago“…时间前”结构：时间段+ago, 用于一般过去时。

　　The Greens moved to Shanghai four weeks ago. I saw it ten minutes ago.

　　(若有since+时间段+ago，常用现在完成时：Mr. Li has worked here since 5 years ago.)

　　4before 单独放在句尾，常用现在完成时：“以前”

　　I have been to London before. He has seen the film before.

　　(若是时间段+before,常用过去完成时，“…前”： I had seen the film two weeks before. We had found out the answer to the problem an hour before.)

　　通过上面对时间词用法的讲解学习，相信同学们能很好的掌握了此语法的用法，希望同学们在考试中取得优异的成绩。

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