1. The money could have been hidden
by an accomplice (helper).
Negative: Put “not” after the first
word in the verb phrase.
The money could not have been
hidden by an accomplice

2. The money could have been hidden by
an accomplice (helper).
Question:
Start with the first helping verb +
subject
Could the money have been hidden by
and accomplice?

3. Earhart and Noonan might have
been captured by the Japanese.
Might Earhart and Noonan have
been captured by the Japanese.

4. I would not have been happy if I
had married him.
Would you have been happy if you
had married him?

5. He would not have been hurt in the
accident if he had been using his
seat belt.
Would he have been hurt in the
accident if he had been using his
seat belt?