1.the coffee is very hot . I can't drink it
----> the coffee is so hot that I can't drink it. ( Hoặc the coffee is too hot for me to drink )
2. I couldn't catch him because he ran very fast
-----> he ran so fast that I couldn't catch him.
3. the bag was so heavy that I couldn't carry it
------> It is such a heavy bag that I couldn't carry it.
4. It is such a long homework that I can't finish it is an hour
-----> the homework is so long that I can't finish it is an hour.