When somebody travels with me, they have to teach me a topic.

　　當有人和我一起旅行的時候，他們必須教我一個話題。

　　It is time for somebody to teach you to behave yourself.

　　該是有人教你禮貌點的時分了。

　　Somebody bought the grandma her first ever digital camera as X 'mas present, but forgot to teach her how to use it.

　　有人給奶奶買了一臺數碼相機作為圣誕禮物，但卻忘了教她如何使用。