that is why and that is because
that is why后面跟的是結(jié)果,譯為：“那是（為什么）.的原因”
例如：
Tom overslept this morning.That is why he was late for work.
湯姆今天早晨睡過頭了.那是他上班遲到的原因.
that is because后面跟的是原因,譯為：“那是因?yàn)?”
例如：
Tom was late for work this morning.That is because he overslept.
湯姆今天早晨上班遲到了.那是因?yàn)樗^頭了.