6. Because of the steadily developing national economy, our life is becoming more comfortable

=> because of+Ving/N=Because+mệnh đề

7. No problem is more difficult than this

=> không vấn đề nào thì khó hơn vấn đề này

8. Immediately after he had arrived, things went wrong

=> ngay sau khi anh ấy đến, mọi thứ trở nên tồi tệ

9. The wallet which Henry found has no name in it

=> which thay cho the wallet

10. The older I get, the less I want to travel

=> so sánh kép: comparative form+S+V, comparative form+S+V

6. Because of the steadily developing national economy, our life is becoming more comfortable

(Because of + N/V-ing + .. )

7. No problem is more difficult than this

(So sánh hơn: S + V + more + adj/adv + than + S)

8. Immediately after he had arrived, things went wrong

9. The wallet which Henry found has no name in it

(which là đại từ quan hệ chỉ đồ vật)

10. The older I get, the less I want to travel (so sánh kép)