3ala +attached pronoun can have few meaningDepends on the context
Can mean :on,at,about,for,against,also as possesing sth ,having sth
Few examples
ex1.7oTTo 3ala tarabeeza=Put in on the table!!!
ex2.3ala 3eed al-melaad=At Christmas
ex3.Daf3ato 3aley(h)o 2add eih?How much did you pay for it?
ex.4.3alayy shoghl=I have got work to do