alls
Alls (determiner) means a nonstandard or dialectal form of "all," used the same way. Example: “Alls I know is he left before sunrise.”
How to use alls
Learner’s notesIn plain EnglishAn informal way some speakers say "all" — most often heard in the set phrase "alls I know/want is..."
Strictly spoken/informal usage — avoid it in writing that isn't deliberately capturing casual speech.
Fill the gap
Can you complete this real example?
_____ I know is he left before sunrise.