7) "be" is:
A. Modal Auxiliary Verb
B. PrimaryAuxiliaryVerb.
C. All above.
D. None of all above.
I think the answer is "B"
Because the primary auxiliary verbs in English are (be, do, and have),these verbs are being changed and transformed from a sentense to another depending on the "Subject" means (I,you,He,She,...)
but the modal auxiliaries are (can, could, may, might, must, shall, should, will, and would)
Thanks