1. I just put my foot in my mouth. 我刚才说错话了。
2. You need to put your foot down. 你必须坚定立场。
3. They got off on the wrong foot. 他们第一次见就没给彼此留下好印象。
4. You're on my foot. 你踩到我了。
5. The shoe is on the other foot. 形势已经完成不同了。
