1. The suitcase is too heavy . She can't carry it upstair .

--> ( SO) The suitcase is so heavy that she can't carry it upstair.

--> ( TOO ) The suitcase is too heavy for her to carry it upstair.

2. The train arrived late . We didn't have time for shopping .

--> ( SO ) The train arrived so late that we didn't have time for shopping.

3. The tea is very hot . They can't drink it .

--> ( SO ) The tea is so hot that they can't drink it.

--> ( TOO ) The tea is too hot for them to drink it.

--> ( ENOUGH ) The tea is not cold enough for them to drink it.

Giải thích:

Cấu trúc:

S + be + so + adj + that + S ​+ V

S + be + too + adj + (for somebody) + to V

S + tobe not + adj + enough + (for SB) + to V

1. The suitcase is so heavy that she can't carry it upstair.

The suitcase is too heavy for her to carry it upstair.

2. The train arrived so late that we didn't have time for shopping.

3. The tea is so hot that they can't drink it.

 The tea is too hot for them to drink it.

The tea is not cool enough for them to drink it.

Do

S + be + so + adj + that + S ​+ V

S + be + too + adj + (for sb) + to V

S + tobe not + adj + enough + (for Sb) + to V