Question

Today I must give my homework to the teacher. Identify the modal in the given sentence.
must
today
give

Answer 1

$\huge\mathcal\red{Must}$

Must is a modal verb most commonly used to express certainty.

Explore more :

There are nine modal verbs in English: can, could, may, might, will /shall , would, should, must , ought and need ( need can also be a main verb )