1. Although Quang Hai -footballer is so young, he plays football beautifully.

Despite being so young, Quang Hai plays football beautifull

Despite/ In spite of + (cụm) danh từ/ v-ing , mệnh đề.

2. I often walked to school when I was a student.

I used to walk to school when I was a student

S + used to + V-inf (nguyên mẫu)

3. In spite of being so young, Tien Dung goalkeeper performs excellently.

Although Tien Dung - goalkeeper is so young, he performs excellently

Although+ mệnh đề 1,mệnh đề 2.

4. They will show this flying car to the public when they finish it.

This flying car will be showed to the public when it finish

S + will (not) + be + P II.

5. The countryside doesnt suffer as much pollution as the city. (LESS) 

The countryside suffer less pollution than the city

1. being young, Quang Hai footballer plays football beautifully

despite Ving/N: mặc dù

2. to walk to school

used to V: thường hay làm gì trong quá khứ và bây giờ không còn nữa

3. Tien Dung goalkeeper is so young, he performs excellently

although + mệnh đề: mặc dù

4. will be shown to the public when they finish it

bị động: tobe Vp2

5. The country suffers less pollution than the city

less...than: ít hơn