航班即将起飞英文

Attention please , the flight No.（航班号）from (起始点） to (终点站）is going to take off .

The plane is taking off. 将要起飞你可以用will或者be going to

The plane is to take off.

the plane is taking off.

be +doing 要表示将来时态只有当do是位移动词时才行比比如come.leave 所以正在起飞是The plane is taking off .而The plane is on take off。当中on 是介词后接动词原型明显不对。