Occasionally, he will spontaneously generate the sentences on his own and sometimes uses, "May I have."
In spoken English, it may be acceptable for this sentence, but in written English.
“. . . and sometimes (he will) use . . .”
Yes, we can! You can learn additionally about if-clause conditions to see how it works.
If you like my answer, you will mark an answer as correct (the green check image) on this answer. :)