1. Although it rained heavily yesterday ,they went to school on time.
-> Although + S + V, S + V : Mặc dù
= Despite + Ving/N, S + V
2. It is not good for you to stay up too late
-> It's + adj + (for sb) + to V
3. I have been playing tennis since I was 10 years old
-> Started/Began + Ving/to V
= S + have/has + been Ving
