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Yes, you can Yes, you could No, you can't No, you couldn't
did; have watched was doing; were watching had done; were watching would do; were watching
Yes, you can Yes, you could No, you can't No, you couldn't
after because while as soon as
that I had finished my homework that had I finished my homework whether had I finished my homework if I had finished my homework
did; have watched was doing; were watching had done; were watching would do; were watching
was doing；when did；when was doing；while did；while
if I hace finished my homework if my homework had finished or not whether or not had I finished my homework whether I had finished my homework
did my homework am doing my homework do my homework was doing my homework
did do was doing were doing
to listen not listen not to listen listening
was doing; watched did; was watching did; watched was doing; was watching
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