## were pregnant by their father ##

"got pregnant from their father" or "became pregnant by their father" or "conceived children with their father"

## He became ##

"He is"

## the Moabites of today ##

"the Moab people who are now living."

## of today ##

The word "today" refers to when the author of Genesis was living. The author was born and wrote this many years after Lot's family lived and died.

## the children of Ammon ##

"the descendants of Ammon" or "the Ammon people"