3. In the simple present and simple past tenses, we
use do as a helping verb when we have a different
main verb.
For example
Do you think kids are cute?
Do you want to have kids some day?
4. WHEN DO WE USE BE (AM – IS -
ARE)?
We use be as our verb when we do not have another verb in the
simple present or past tense.
Typically, be is followed by an adjective, a noun, or a prepositional
phrase.
7. BE OR DO?
…Do… you like that film?
…Is…. he your friend?
…Does…. Mary go out with friends?
…Is…. John Peter’s dad?
…Are…. your friends with you?
…Do…. your parents live with you?
…Is…. Helen in Argentina?