5．其他用法

　　(1)现代英语中，像lie，rest，wait，stay，sleep等谓语动词更倾向于用现在完成进行时。

　　The baby has been sleeping for about ten minutes.

　　这孩子已经睡了大约十分钟了。

　　(2)It is＋一段时间＋since＋从句时，从句一般用过去时。

　　(3)It/This is＋the first time＋从句，从句往往用现在完成时。

　　Ⅰ.用所给动词的正确时态完成下列句子

　　1．You should go to bed.You________________(watch)TV for 5 hours.

　　2．I________________(learn)English since ten years ago.

　　3．I________________(look)for him everywhere.Where can he be?

　　4．They________________(help)us since five o'clock this morning.

　　5．I________________(work)in this school since I graduated from college.Now I am still working here.

　　6．You know，I________________(look)for a job for three months，and this is my first formal interview.

　　7．My sister________________(stay)in Beijing for three months.

　　8．The little boy is dirty all over because he________________(play)in the mud all the morning.

　　9．He________________(read)in the library since it opened this morning.

　　10．Here he is！We________________(wait)anxiously for him since last night.

　　答案：1.have been watching　2.have been learning

　　3．have been looking　4.have been helping　5.have been working　6.have been looking　7.has stayed　8.has been playing/has played　9.has been reading　10.have been waiting

　　Ⅱ.完成句子

　　1．我们找了你一个小时。

　　We __________________ you for an hour.

　　2．她毕业后一直在教英语。

　　She __________________ English since she graduated.

　　3．他这个星期来看她好几次。

　　He __________________ her several times this week.

　　4．虽然我一直在想着她，但是我不能见她。

　　I ________________________ her but I can't see her.

　　5．我已经睡了至少8个小时了，可还是觉得累。

　　I __________________ for at least 8 hours，yet I still feel tired.

　　答案：1.have been looking for　2.has been teaching　3.has called on　4.have always been thinking of　5.have been sleeping