All modal verbs are auxiliary verbs, which means they can only be used with a main verb. Modal verbs cannot be a main verb. They are used to express ideas such as possibility, prediction, speculation, deduction and necessity.
It's time to put aside some time for learning phrasal verbs! In English, some phrasal verbs, such as "put aside," have more than one meaning. Check out this American English at State graphic to learn the multiple meanings of "put aside" and other phrasal verbs with the verb "put." What other phrasal verbs with "put" do you know? #AmericanEnglish