+0

I need to use Future Continuous, but there is no subject here.

What time ... (leave) for the party?

+1
red train 520

I need to use Future Continuous, but there is no subject here.

What time ... (leave) for the party?

The future continuous is, as you probably already know, will be leaving.

And that by itself won't complete the given sentence correctly.

Either you have to add your own subject (I suggest we), or the example is faulty.

CJ