be to do ; will be ; be going to ; be about to ; 现在进行时表将来有什么

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be to do ; will be ; be going to ; be about to ; 现在进行时表将来有什么区别?

1be to do 这种结构表示职责,义务,意图,约定,可能性等.
You are to be back by 10 o'clock 你必须十点钟回来
We are to meet at the school gate.我们约定在校门口见面.
2 will 表示将来的动作或状态这个用法比较普遍,多数情况都能用,但是切记不能用在if引导的条件句里
3be going to 表示打算在最近或将来要做某事,着重在打算上.
4be about to 表示即将做某事
the meeting is about to start 会议即将开始
这个结构中不能接时间状语

be to do ; will be ; be going to ; be about to ; 现在进行时表将来有什么 be doing (现在进行时表将来）和be going to do有什么区别将来时有BE DOING么?be going to do和BE DOING是算在现在进行时表将来? will,be going to do,be doing表将来将来时态的区别be going to;will do;be doing;be to do;be about to do 求be going to be to do be about to 一般现在时表将来的作文,急 be to be ,be going to be ,be about to be ,will be ,表示将要,有什么区 be going to 是现在进行时表将来吗 be going to和will do和be about to do和be to do和be doing都表示将来,有什请问be going to+动词原形与现在进行时表将来有什么区别 will be doing,be going to do,will do ,有什么差别?be going to leav 关于将来时态 be going to; will do; be