I’ve seen this text in which "sometimes" has been used with "will". I assume the sentence is explaining a habit, and I wonder why it’s been said with "will".
Sometimes I'll wave to him in the morning and he doesn't even wave back.
I’ll really appreciate it if you can explain the reason.
Here I add the whole text:
"The man who lives next to me is moving. I can't say that I'm too upset about it. He's lived next to me for almost five years, but I don't think he's spoken to me more than three or four times. Sometimes I'll wave-to him in the morning and he doesn't even wave back."
Sometimes I will/ I will sometimes
is a common usage , google search for exact phrase provides millions of hits - google.com/search?q=%22i+will+sometimes%22 . One question related to the sentence you have cited though, would be - what should it use instead of doesn't? won't would agree with will. As in -Sometimes I'll wave to him in the morning and he won't even wave back
. Or probably it can also be wouldn't, I'm not sure.