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Ex4/
1. When they were younger, Tom and Mary used to live in the same building.
-> used to V : đã từng làm gì
2. Tom and his bother didn't use to get on very well.
-> get on well : có mối quan hệ tốt
3. I am trying to get used to driving on the left of the road.
-> get used to Ving : quen làm gì
4. I didn't use to have a birthday party because we were so poor.
-> used to V : đã từng
-> phủ định : didn't use to
5. It is two days since we last spoke with him.
-> It's + time + since QKĐ
6. My brother has worked as a private trainer since 2018.
-> từ QKĐ chuyển sang HTHT have/has V3/ed, since + mốc thời gian
7. I didn't know that Tom used to be a policeman before he became a farmer.
-> used to V : đã từng
8. I don't play tennis as much as I used to.
-> so sánh bằng as adj as
-> as much as : nhiều như