It could be:a be verb = am waiting, is kept.an auxiliary verb = have been waiting.a modal auxiliary verb = could have been waiting.
is waiting are waiting was waiting have waited had waited has been waiting
The phrase "had been waiting" is the past perfect continuous tense of the verb "to wait." It functions as a verb phrase in the sentence.
been I have been waiting for this question.
present perfect continuous ( note spelling) = have/has +been + -ing verb have been waiting / has been sitting / have been talking / has been expecting past perfect continuous = had + been + ing verb had been waiting / had been sitting / had been expecting. -ing verb is called a present participle
waiting isn't a helping verb! I came on this site to find what helping verb could replace waiting!
Yes,waiting is a action verb
Have been is the past participle conjugation of the verb to be, e.g. I have been waiting for you; I have been there before.Have been considered is the past participle of the intransitive verb to consider, e.g I have been considered for the post of manager
It is "be".
There is no rule about how many you can have.has seen - this verb phrase has twohave been waiting to go - this verb phrase has four.
The phrase "Accident Waiting to Happen" is a noun phrase. It functions as a subject or object in a sentence, describing a situation or event that is likely to result in an accident.
No, "You hate waiting in line" is a complete sentence. The verb is "hate".