Combine the lollowing senttences into one sentence, using (not) + adj + enough

Combine the lollowing senttences into one sentence, using (not) + adj + enough
1.The weather isn't very warm.We can't go swimming.
2.I am very lucky because I have many good friends.
3.This exercise is too difficult for me to do.
4.He is too young too drive a car.
5.The book was so intersting that I read it twice.
6.It is book such cold water that you can't smimming today.