What is the complete predicate in the question: Did you know the ancient Greeks wrote many plays?

3 answers

GI
___
ccccc

What is this phrase?
Noah, "Did...know"

The phrase that follows is the object, what they knew.

I hope this helps. Thanks for asking.
First, if you have a question, it is much better to put it in as a separate post in <Post a New Question> rather than attaching it to a previous question, where it is more likely to be overlooked.

Unfortunately, I don't know the answer to your question.

Posting it separately is more likely to get the attention of someone who can provide an answer.

I hope this helps. Thanks for asking.