1. 你妈妈今天心情不好,不要惹怒她:
Your mother is in bad mood today. Don't step on her toes.
(in bad mood, mood 情绪,in bad mood表示心情不好。)
2. 他们是好朋友,但时不时也会把惹怒对方:
They are very good friends, but from time to time they step on each other's toes.
(from time to time表示时不时,有时)