=>
1. He used to go to school on foot when he was in primary school.
-> used to V : đã từng
2. Did you use to go to the beach when you lived in Da Nang?
-> used to V : đã từng/nghi vấn : Did S use to V?
3. The distance from Ha Noi to Vinh is about 200 kilometers.
-> it is (about) + khoảng cách + from...to... = the distance from...to... + is + khoảng cách
4. How far is it from Ha Noi to Hue?
-> hỏi khoảng cách : how far is it from...to...?
5. Although Mai was ill, she could go to school yesterday.
-> although : mặc dù
6. In spite of being short, he still loves playing sports.
-> in spite of N/Ving : mặc dù

1. He used to go to school on foot when he was in primary school.

2. Did you use to go to the beach when you lived in Da Nang ?

3. The distance between Ha Noi and Vinh is about 200 kilometers.

4. How far is it from Hanoi to Hue?

5. Although Mai was ill, she could go to school yesterday.

6. In spite of being short, he still loves playing sports.

= In spite of the fact that he is short, he still loves playing sports.

> trong 1 câu có 2 mệnh đề, có chủ từ giống nhau, ta có thể bỏ 1 chủ từ, và đổi động từ thành nguyên mẫu (V bare), rồi thêm "ing" vào nó, và mệnh đề còn lại giữ nguyên.

- Although he is short, he still loves playing sports.

> ta thay "although" bằng "inspite of", bỏ "he", đổi "is" thành "be", rồi thêm "ing",  mđề còn lại giữ nguyên.

> In spite of being short, he still loves playing sports.