is become 和 is becoming 这两个短语有何区别?

is become 和 is becoming 这两个短语有何区别? is becoming和have become什么意思,区别, her wish is to become a doctor 和 ````becoming ``有什么区别吗? 两个英语短语的区别that is to say 和 in other words 有没有区别? 系动词,比如become可以有过去式,但是可不可以变成is becoming? there is 和 have 有何区别? His wish is to become a scientist为什么不是becoming what is it 和 what it is 有何区别 His ambition is _ an actor.A.becoming B.become C.to become D 两个短语的区别want to be 和want to become 的区别. Who she was和Who is she有何区别 It is said 和It says有何区别?