1.The children enjoyed walking in the rain.

(enjoy + Ving )

2.My grandmother is too old to work now

4. The sea was so rough that the children couldn't swim in it.

S + be + so + Adj + that  : quá .... đến nỗi

5.Ba is shorter than Hung

(So sánh hơn : S1 + tobe + adj+er + than + S2)

6.It took us a long time to learn this

(It took + sb + time + to V)

7. Peter isn't  old enough to see horror film          

8. When is your birthday ?

2. The children enjoyed walking on the rain 

3. My grandmother is too old to work now

4. The sea was so rough for the children to go swimming

5. Ba is shorter than Hung

6. It took us a long time to learn this

7. Peter is not  old enough to see horror film          

8. When is your birthday ?

Xin ctlhn !