17. The fire isn't very hot. It won't boil a kettle.
\(\Rightarrow\) The fire isn't hot enough to boil a kettle.
18. You are quite thin. You could slip between the bars.
\(\Rightarrow\) You are thin enough to slip between the bars.
19. He is very ill. He can't eat anything.
\(\Rightarrow\) He is too ill to eat anything.
20. Our new car is very wide. It won't get through those gates.
\(\Rightarrow\) Our new car is too wide to get through those gates.