1.The car is not cheap enough for him to buy.
-The car is so expensive that he cannot afford to buy it.
-The car is such an expensive purchase that he cannot make it.
2.The weather was too bad for us to go camping.
-We couldn't go camping because of the bad weather.
-The bad weather prevented us from going camping.
3.Neither does the boy do homework nor does he cook.
-The boy doesn't do homework, and he also doesn't cook.
4.Neither my dad nor my mom went to the party.
-My dad didn't go to the party, and my mom didn't either.
-My dad and mom both did not attend the party.