plane takes off 谓语动词时take吗?如果是,那off是什么?难道take off 一个短语可以做谓语吗

The plane has taken off 这里的谓语是taken off吗 She sat down quiet 英语句子时态问题.the plane will take off at 9:00the plane takes off The plane takes off at 8 o'clock The plane will take off at take off take off等于land吗 take the coat off,或者 take off the coat 都可以,新概念说off是副词 He takes off his riancoat.这句中的take off的take为什么是用复数? take.off.注意：是take.of.,不是take off! At what time____the plane ______(take off) take off ,be off,go off,see...off,turn off pull off=take off? 英语中谓语和谓语动词是一回事吗?谓语动词是不是就是一个动词,而谓语既可以是谓语动词也可以是动词短语