Question

Which are the "be" helping verbs

A. winter, bus, billy, biscuit
B. when, beside, because
C. were, be, been, being
D. before, be, beneath

Answer 1

In option C all the words are a form of the verb "to be"

were: simple past,

be: infinitive
been: past participle
being: present participle

so this is the correct answer, as "to be" is a helping verb