33 They have been to the Philipines,haven't they?
34 Nam said they were learning English at that moment
35 It doesn't rain in winter, so people in this area lack water
36 This letter must be answered immediately
33. They have been to the Philipines, haven't they?
-> Mệnh đề chính khẳng định, câu hỏi đuôi phủ định. (chia HTHT)
34. Nam said they were learning English at that moment.
-> Câu tường thuật lùi thì: HTTD -> QKTD, chuyển we -> they, this -> that.
35. It doesn't rain in winter, so people in this area lack water.
-> So + mệnh đề: vì thế
36. This letter must be answered immediately.
-> Bị động với ĐTKT: must + be + Vpp (+by O)
