British English usage: At A2, core modal meanings include ability, permission, obligation, prohibition, advice and possibility. Modals are followed by the base form.

Cambridge Grammar reference: Cambridge treats modal verbs as meaning-bearing auxiliaries: they do not use do/does in ordinary modal questions and the following verb remains in the base form.

Source note: HiLernity is independent and is not affiliated with or endorsed by the British Council or Cambridge University Press & Assessment.