ask for sth
phr. v..phr. v.. To say that you want someone to give you something or do something for you.
phr. v.. To make a request for an object, service, or abstract thing; this phrasal verb is transitive and inseparable.
She asks for a glass of water.
If you don't understand the instructions, you should ask for clarification from your teacher.
Even though the kingdom was on the verge of collapse, the proud monarch refused to ask for aid from neighboring realms.
The word or phrase that comes after 'for' is the item being requested.
Contrast with 'request' (more formal) and 'demand' (stronger and less polite); 'ask for' is the most neutral and common choice.
He asked the menu.He asked for the menu.The preposition 'for' is required after 'ask' when you are requesting an object.