- I will appreciate it if you tell me what time you can come.
- I would appreciate it if you tell me what time you can come.
#2 sounds more natural to me since this “if” statement is a hypothetical.
- I would appreciate it if you can tell me what time you can come.
- I would appreciate it if you would tell me what time you can come.
both are ok, but #4 sounds better - can implies ability, not necessarily willingness, so it sounds a bit odd to appreciate someone’s ability
- I appreciate it if you will tell me what time you can come. incorrect - use “I appreciate” for something that has already been done.
Please correct the above and comment.
Thanks.