`14.` Local authorities gave a flood warning yesterday so today people are moving to safer places.

`-` give a warning: đưa ra cảnh báo

`-` 'so' dùng để nói giữa 2 mệnh đề `->` Chỉ kết quả của sự việc, hành động

`15.` Although my grandfather is very old, he is still young at heart.

`-` CT: Though/Even though/Although + S + V, S + V: Mặc dù ...

`16.` Before we go shopping, we should make a shopping list.

`-` Before + S + V: Trước khi ...

`-` should + V-inf: nên làm gì

`17.` My sister told me that she was going to work in Spain the next/following year.

`-` Câu tường thuật gián tiếp: S + said/told that + S + V (lùi thì)

`-` TT `->` GT: HTTD `->` QKTD, next year `->` the next/following year

`18.` She asked me what a UFO looked like.

`-` Câu tường thuật với WH- ques:

S + asked/wondered/wanted to know + WH- + S + V (lùi thì)

`-` TT `->` GT: HTĐ `->` QKĐ

`19.` It was easy to find bookshops in any town or city.

`-` CT: It + tobe + adj + (for sb) + to V

`->` Nó thế nào cho ai đó để làm gì

`20.` Tom said he couldn't connect to the Internet to work online there.

`-` Câu tường thuật gián tiếp: S + said/told that + S + V (lùi thì)

`-` TT `->` GT: can `->` could, here `->` there

`21.` As soon as Tom heard the warning of the tornado, he went searching for his children.

`-` As soon as + S + V: Ngay khi ...

`-` go searching for sth/sb: tìm ai đó/cái gì

`22.` It's hard for us to predict when earthquakes will happen.

`-` CT: It + tobe + adj + (for sb) + to V

`->` Nó thế nào cho ai đó để làm gì

14. Local authorities gave a flood warning yesterday so today people are moving to safer places

Clause + so + clause: vì vậy 

15. Although my grandfather is very old, he is still young at heart.

Although + clause, clause: mặc dù 

16. Before going shopping, we should make a shopping list.

Before + Ving, clause: trước khi làm gì 

17. My sister told me that she was going to work in Spain the next year.

S + told + O + (that) + S+ V (lùi thì)

TLG --> was/were + going to + V1 

next year --> the next year / the following year 

18. She asked me what a UFO looked like.

S + asked + O + Wh + S+ V (lùi thì)

HTĐ --> QKĐ

19. It was easy to find bookshops in any town or city

It + be + ADJ + to V

20. Tom said that he couldn't connect to the Internet to work online there.

S + said +(that) + S+ V (lùi thì)

can --> could 

here --> there 

21. As soon as Tom heard the warning of the tornado, he went searching for his children.

As soon as + QKĐ, QKĐ: ngay khi

22. It's hard for us to predict when earthquakes will happen.

It's + ADJ + (for O) + to V 

23. Trùng câu 14 

`color{orange}{~MiaMB~}`