Question

How will we rewrite this sentence " We found out when he died how rich he was." Beginning with " It was not until...." ?

Answer 1

“We found out when he died how rich he was."  

This sentence can be rewritten with the beginning "It was not until...." is“ It was not until we found out when he died how rich he was.”

The beginning words “It was not until” is directly attached to the sentences and not change the meaning of the phrases.

Answer 2

It was not until he died that we found out how rich he was.