英语题,用所给动词正确时态填空

用所给动词正确时态填空1.Youshouldgotobed.You____(watch)TVfor5hours.2.I____(write)letterssincebre... 用所给动词正确时态填空
1. You should go to bed. You ____ (watch) TV for 5 hours.
2. I ____ (write) letters since breakfast.
3. I ____ (write) 3 letters since breakfast.
4. Sorry,but Mr.Smith ____(leave) for Beijing
5. I ____ (look) for him everywhere,where can he be?

求求各位了,谢谢各位了!!!
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双赢兼赢
2011-08-01 · TA获得超过6.5万个赞
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have watched 现在完成时
have been written 现在完成进行时 一直在做某事
have written
has left
have looked
地球总司令
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1.have watched
2.have been writing
3.have written
4.has left
5.have looked
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知道之星就是我
2011-08-01 · TA获得超过4.4万个赞
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have been watching
have been writing
I have written
has left
have been looking
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wanggy119
2011-08-01 · TA获得超过5.6万个赞
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1. You should go to bed. You _have been watching___ (watch) TV for 5 hours.
2. I _have been writing___ (write) letters since breakfast.
3. I _have written___ (write) 3 letters since breakfast.
4. Sorry,but Mr.Smith _has left___(leave) for Beijing
5. I _have looked___ (look) for him everywhere,where can he be?
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lvsabine
2011-08-01
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1.have watched
2.have writen
3.have already writen
4.has left
5.looked
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hffsophie
2011-08-01 · TA获得超过432个赞
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have been watching
have been writing
have written
have left
have been looking
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