I'm trying to understand why the plural is used in this case instead of the singular. The sentence uses the plural version of the past tense of "be" when referring to "the flow".
Why is the sentence written this way "If the flow were working" instead of "If the flow was working"?
If this was at the present tense, I don't think it would've been written as "If the flow are working".
The snippet is pulled from the Popular Science magazine, summer issue of 2019 page 64.
If the flow were working properly the ground would filter rainwater, ...