be to do和be about to do有什么区别?
be to do be about to do 有什么区别
be about to do和mean to do和intend to do有什么区别
be to do和be about to do有什么区别?
be to do sth.和be about to do sth.有什么区别?
is about to do和will be有什么区别?
be going to do、be about to do、be to do,这三者有什么区别?
be about to do和be about doing 区别
be able to do和do有什么区别.
be to do & be about to do的区别
to do 和 to be done 有什么区别?
be to do,be going to do,will do,be about to do的区别.
be about to do