behaving这是什么语法?behaving有表示将来时的含义,请问这是什么语法?A:Joe'shavingapartytonight.Doyouwanttocome?B:Whatkindofapartyisit?A:乔今晚要办一个派对.你要不要来?B:是什么样的派对呢?bedo

Question

be having 这是什么语法?
be having 有表示将来时的含义,请问这是什么语法?
A:Joe's having a party tonight.Do you want to come?
B:What kind of a party is it?
A:乔今晚要办一个派对.你要不要来?
B:是什么样的派对呢?
be doing当然是常用的进行时态，偶尔也可以表示将来时。可是为什么have这个动词可以用进行时表将来？have不属于瞬间动词.
是固定搭配？
从语法的角度怎么说，希望答案具体化。光有例句不能解惑

Answer 1

可以是将来进行时Joe's having a party tonight.
也可以是现在进行时 Joe's having his dinner.
过去进行时 Joe's was having his dinner when his mum was murdered.