Learn English: “How come?”

source: Learn English with Emma [engVid]    2017年11月6日
“How come?” is a very, very common English expression that is important to learn. It is used all the time, but many textbooks and teachers don't teach it, because it is informal. In this simple video, I will teach you what “how come” means, how to use it, and when to use it. After watching, take the quiz at https://www.engvid.com/how-come/ to make sure you've got it!