[Grammar] Future Simple Vs. Future Perfect

[Stephanie Phoenix]

Hello! Could you help me understand the differences between FS and FP in this two cases? What tense is more appropriate here?

The film will not probably finish until midnight.
The film won't probably have finished until midnight.

I hope you won't forget/Won't have forgotten your promise by tomorrow.

 

[bhaisahab]

Hello! Could you help me understand the differences between FS and FP in this two cases? What tense is more appropriate here?

The film will probably not finish until midnight. :tick:
The film won't probably have finished until midnight.:cross:

I hope you won't forget/Won't have forgotten your promise by tomorrow. Both are OK.

Bhai.

 

[5jj]

The film will probably not have finished by midnight.

That works.

 

[Raymott]

I was going to go, "The film probably will not finish until midnight." (That is, 'probably' can go almost anywhere except where the OP has put it.)
Also, I agree that both are possible, depending on the meaning, the difference of which I believe the OP is asking about. (It seems that no one so far thinks the difference in this example is interesting or important enough to explain, but someone might feel otherwise.)