thanks a lotThe sentence in post #1 doesn't containt any comma (there's no punctuation). The one above isn't punctuated correctly either. I think you will have to start a new thread to ask about the comma and provide the full sentence as it is in the source (+ the source itself).
The sentence is eitherthis was followed by a period of rapid growth in / with the birth rate of US reaching a peak of 20 percent in 1950
which one is correct and why?
thanks for the response!
I think both parts of that are incorrect.In the first case, the phrase with 'in the birth rate...' is actually a part of the noun complement and you don't need a comma. In the second case, with 'with', you just add an additional piece of information and you need a comma.
Why do reaching" need to be changed into" that reaching"?The sentence is either
(i) this was followed by [a period of rapid growth in the birth rate of US]
reachingthat reached a peak of 20 percent in 1950
this was followed by a period of rapid growth [with the birth rate of US reaching a peak of 20 percent in 1950]