11 He is very ill. He can't eat anything. Therefore, he is unable to consume any food due to his illness.

It won't get through those gates. The object or person in question is unable to pass through the gates due to their size or other physical limitations.

13 The floor wasn't strong. We couldn't dance on it. The floor lacked strength, making it unsuitable for dancing.

14 I was terrified. I couldn't move. The speaker was filled with fear, rendering them unable to move.

15 The bull isn't big. He couldn't harm you. Despite not being large in size, the bull is still unable to cause harm.

16 The coffee isn't strong. It won't keep us awake. The coffee lacks strength, meaning it will not have the desired effect of keeping the speaker awake.

17 The river is deep. We can't wade it. The river's depth prevents the speaker from wading through it.

18 He is lazy. He won't get up early. Due to his laziness, he is unwilling to wake up early.

19 He won't get up early so he never catches the fast train. Because he refuses to wake up early, he consistently misses the opportunity to catch the fast train.

20 The package is very thick. I can't push it through the letterbox. The package's thickness makes it impossible for the speaker to push it through the letterbox.