My father _ for London tomorrow ,there is _ an important mee

My father _ for London tomorrow ,there is _ an important meeting
A is leaving to be B is goning to leave having
有there is dong 的结构吗 还有表示将来时的有什么 他们有什么区别

leave这个词的将来时有以下几种：will/shall(主语为I/we) leave; be going to leave; be leaving
从这一点上来讲,两个选项都可以,there is to be 没见识过,但我知道绝对不会有there is having,因为当have为实义动词时,是不可能和there连用的
能用进行时表示将来时的动词不多,主要是一些短暂性动词,如：go come arrive leave等

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