Answer:
II.
1.Wehave been waiting for the bus for 10 minutes.
2.I have been learning English since October.
3.Hai has been working there since 20 July.
4.They’ve been going there for years.
III.
1.Have you been waiting here for too long?
2.What have you been doing?
3.How long have you been working there?
4.How long have you been selling computers?
Cấu trúc đã sử dụng:
(+) S + has/have + been + V-ing + O.
(?) (WH/H) Has/Have + S + been + Ving?
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