Answer:
you are correct!
Explanation:
your current answers are right!
It's to show an exception (which is often the purpose of "yet") because in the first clause it identifies an action, then then it's like "but wait, maybe the action didn't really get going" in the second half of the sentence
Answer:
The children promised <em><u>to </u></em><em><u>be</u></em> back by mine.
