5. There were some trees in the field, but now there aren’t any.

There used to be some trees in the field, but now there aren't any.

used to + V

7. I’ve been too busy to answer by email. I’ll do it soon. (nevertheless)

I've been too busy to answer by email. Nevertheless, I'll do it soon.

Nevertheless + mệnh đề = However + mệnh đề : tuy nhiên

xin hay nhất ak

=>

1. Did you use to go to the beach when you lived in Nha Trang?

-> used to V : đã từng/ nghi vấn : Did S use to V?

2. In spite of living in the same street, we rarely see each other.

-> in spite of N/Ving ~ although S V : mặc dù

3. They didn't use to go to the cinema every Sunday last year.

-> used to V : đã từng/ phủ định : didn't use to V

4. In the past my hair used to be shorter than that now.

-> used to V : đã từng

5. There used to be some trees in the field, but now there aren't any.

-> used to V : đã từng

6. Although my foot was hurt, I managed to walk to the nearest village.

-> although S V : mặc dù

7. I've been too busy to answer by email. Nevertheless, I'll do it soon.

-> nevertheless : tuy nhiên