`3.` As there is nothing to eat, we have to go shopping today. 

`-` As + MĐ nguyên nhân : bởi vì

`4.` When I go to Hue next week, I will stay with my aunt and uncle.

`-` When + S + V(HTĐ)…,  S + V(TLĐ)

`=>` Diễn tả hành động nối tiếp nhau trong tương lai

`5.` Mai studied hard for the exam so that she could have good marks.

`-` So that + MĐ kết quả: vì vậy , cho nên

`6.` We need an umbrella since it is raining heavily outside. 

`-` since + MĐ nguyên nhân : bởi vì

`7.` Nick will visit some craft villages after he finishes the Vietnamese course. 

`-` after + HTĐ, TLĐ : sau khi .... thì

`8.` We decided to go for a walk in the park even though it was very cold out. 

`-` even though + MĐ tương phản : mặc dù

`9.` The tourists wanted to buy some silk. They went to Van Phuc village.

`-` because + MĐ nguyên nhân : bởi vì

`10.` They won't buy the new car until they save enough money. 

`-` until + HTĐ , TLĐ : mãi cho đến khi .... thì