I do think you'll have to walk and talk if you are teaching something.

我确实认为如果你想教什么你就必须擅长。

哈佛公开课 - 幸福课课程节选

which would allow me to teach English in France for a year at a high school.

如果申请成功的话，我可以去法国的高中教一年英语。

耶鲁的著名人士 - SpeakingMax英语口语达人

Once again I wouldn't be teaching this class, if I didn't change is possible.

如果我认为没有改变的可能，就不会教这节课。

哈佛公开课 - 幸福课课程节选

I've never understand this until I've taught it.

如果我没这样教的话,我永远都不会明白。

麻省理工公开课 - 媒体、教育、市场课程节选