Question

He can swim
across the river very fast
[identify
the model auxiliary and state
its use
in the sentence]​

Answer 1

Answer:

in this sentence (can) is the model auxiliary.

the word auxiliary verb means helping verbs.

definition

A modal is an auxiliary verb (generally termed a helping verb) which is used with a main verb to indicate particular attitude such as possibility, obligation, prediction, etc

the word that helps main verb to form a sentence is known as modal.

we can call modal as modal auxiliaries.