Question

They are waiting for their friends change into past perfect continuous tense

Answer 1

Answer:

They had been waiting for their friends .

this is your answer

Explanation:

when when it comes to 'Perfect ' there has to be a third form of the verb or past participle , here been is the past participle or third form of the verb 'be ' and for the 'past ' I have added ' had' and ' waiting' with 'ing' because of continuous tense .

Now combined this sentenced has transformed into past perfect continuous

hope this helps you understand the conception behind it

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Answer 2

Answer:

They were waiting for their friends.

If my answer is correct, please mark me as brainliest.