1 He has been making this cake for his mom for 10 minutes
2 Paul has been playing game since I came
3 I have been writing this letter for 2 hours
4 We have been studying math since 7 o'clock
5 My brother has been talking on the telephone for half an hour
Dạng 2
1 he last visit you?
2 not worked in the store since 2009
The last time my friend worked in the store was in 2009
3 Kate not has watched TV for a few minutes
It's a few minutes since Kate stopped watching TV
4 I haven't talked with my friend since the teacher come
Đúng 2
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