Could be a useful A Level Language task: getting students to think about using specific vocab to create a relevant register and tone. Shopping Phrasal Verbs and Adjectives - learn English,phrasalverbs,vocabulary,english
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.