In French, there are verbs that don’t take prepositions after them like they do in English (when followed by a noun). Below is a non-exhaustive but pretty common verb list that are not followed by prepositions.
Approuver - to approve of
Attendre - to wait for
Chercher - to look for
Demander - to ask for
Écouter - to listen to
Mettre - to put on
Payer - to pay for
Regarder - to look at
Soigner - to take care of
Here are some sentences where you can view some examples.
J’attends mes parents. - I’m waiting for my parents.
Écoutez-vous la radio - Are you listening to the radio?
Ils regardent la tour Eiffel. - They are looking at the Eiffel Tower.
I never learned this in school so I hope this helps you out in your future studies!