Follow:

1) I usually don't follow strangers.

2) If I speak ill of my brothers, the bad result will follow.

3) He didn't followed on his friend in spite of telling the truth.

4) He  jogs everyday with his dog following him.

5)All of us have to follow our teacher to get a high score.  ...?

Leave:

1)They couldn't help living their country because of the loan shark.

2) Her father leaves gifts or letter when there was fight between them.

3) She had already left house when we got there.

4) I will leave soon beacuse of the work.

5) My father told me that I can leave at any time.(= My fatther told me to leave at anytime.)

+ Cannot help + verb+ing(continueous verb) = It means I cannot refrain/ prevent myself from doing...