填哪个要根据具体语境,联系上下文,单独一句话的话填哪个都说得通
“That is why...”是常用句型,意为“这就是……的原因/因此……”,其中why引导的名词性从句在句中作表语,该句型通常用于针对前面已经说明过的原因进行总结.
“That is because...”句型中从属连词because引导的名词性从句在此作表语,这也是个常用句型,意为“这就是为什么……/因为……”.
“That is because...”与“That is why...”之间的不同在于“That is because...”指原因或理由,“That is why...”则指由于各种原因所造成的后果,例如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