`31.` David used to get up late when he was a child.

`-` Cấu trúc "used to": đã từng

`-` S + used to + Vinf.

`-` get - got - got/ gotten

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

`33.` I couldn't asleep although I was tired.

`-` Clause + although + clause: Mặc dù

`=>` Quan hệ tương phản.

`34.` In spite of having little money, they are happy.

`-` In spite of + N/ N phrase/ V-ing, clause: Mặc dù

`-` Cách chuyển:

Chuyển S + V + O `->` V-ing + O

`+` Bỏ chủ ngữ là "they".

`+` Chuyển động từ nguyên thể "have" `->` "having".

`+` Giữ nguyên tân ngữ.

`35.` We planned to visit Petronas. However, we could not afford the fee.

`-` Clause. However, clause: Tuy nhiên

`36.` The new restaurant looks good. However, it seems to have few customers.

`37.` We had planned to walk right round the lake although the heavy rain made this immpossible.

`38.` It is over 100 kilometres from my house to Ho Chi Minh City.

`-` Cấu trúc: 

The distance between + địa điểm 1 + and + địa điểm 2 + to be + khoảng cách.

`=` It + to be + khoảng cách + from + địa điểm 1 + to + địa điểm 2.