that's because后接某事发生的原因 that's why后接某事产生的结果 如, i was late for the appointment.That's becoz i met with an old friend on the way.我约会迟到了,因为我在路上碰到一位老朋友 i met with an old friend on the way,and that's why i was late for the appointment.我在路上碰到一位老朋友,因此我约会迟到了
