1.The river is very deep. We can't swim in it.

 - The river is so deep that we can't swim in it.

 - It's such a deep river that we can't swim in it.

 - The river is too deep for us to swim in.

2. The floor wasn't strong. We couldn't dance on it.

 - The floor wasn't strong enough for us to dance on.

3. The fire isn't very hot. It won't boil a kettle.

 - The fire isn't hot enough to boil a kettle.

4. I was too tired to eat anything.

 - I was so tired that I couldn't eat anything.

5. The air is so polluted that we can't breathe.

 - The air is too polluted for us to breathe.

 - It's such polluted air that we can't breathe.

1. The river is so deep that we can't swim in it.

→ S + Vbe + so + Adj + that + S + V: .. quá ... đến nỗi mà ...

    It's such a deep river that we can't swim in it.

→ It's + such + (a/an) + Adj + N + that + S + V: ..quá..đến nỗi mà..

2. The floor wasn't strong enough for us to dance on.

→ S + Vbe + Adj + enough + (for sb) + to_V: ... đủ ... 

3. The fire isn't very hot enough to boil a kettle.

4. I was so tired that I couldn't eat anything.

5. The air is too polluted for us to breath.

→ S + V + + too + Adj/Adv + (for sb) + to_V: ...quá...đến nỗi mà

    It's such polluted air that we can't breath.