[Grammar] You have to/will have to supervise the task while/if I'm away.

[NAL123]

1) You have to supervise the task while I'm away.

2) You'll have to supervise the task while I'm away.

3) You have to supervise the task if I'm away.

4) You'll have to supervise the task if I'm away.


Are they all correct? (1 vs 2 and 3 vs 4)

 

[Rover_KE]

Asked and answered here.

You've been a member long enough to know that "we recommend posting a question on one forum only initially. If you do not get a satisfactory answer from that forum and you feel that you have exhausted its possibilities, then of course trying a different forum might help. It is only courteous however, to tell the second forum that you have already asked the question on another forum and then give a precis of the answers you received there, or provide a link to it, along with an explanation of why you are now looking elsewhere."
(emsr2d2)

 

[NAL123]

Asked and answered here.

You've been a member long enough to know that "we recommend posting a question on one forum only initially. If you do not get a satisfactory answer from that forum and you feel that you have exhausted its possibilities, then of course trying a different forum might help. It is only courteous however, to tell the second forum that you have already asked the question on another forum and then give a precis of the answers you received there, or provide a link to it, along with an explanation of why you are now looking elsewhere."
(emsr2d2)

Sorry. I'll keep that in mind. On that site, you usually get answers within half an hour of posting your question. But that was too late, and I had thought I wouldn't get an answer there.