Grammatically correct or not? 

what’s grammatically correct? 

in Doja, there doesn´t live so many people.

Swelling indicates an injury or another health problem (this according to https://www.espressoenglish.net/15-english-phrasal-verbs-in-use-sports-health/)

Swelling indicates an injury or other health problem. (my correction)

(I say) arrive to (supposedly arrive in , or at, but never to)

I arrived to the airport with only 20 minutes until my flight.  

I’ve arrived to Boston.  

he's not coming today or tomorrow. 

(he's not coming today nor tomorrow, he's not coming today and tomorrow)

how do you explain the grammar of this?

when it comes time to work…  (short for becomes?)

could both be right? 

Two thirds of the entire American population live in that red area. 

Two thirds of the entire American population lives in that area. 

5 apples are too many. 

5 apples are too much. 

5 apples is too much.

5 apples is too many.  

The first thing I do is have breakfast.  

mom's suggestion when determining:  is it understood and not blatantly crazy? 

X would have happened, had Y happened.  

X would have happened, if Y had happened. 

had X happened, Y would have happened. 

if X had happened, Y would have happened.  

Ought to 

ought

both correct

ought used as modal

and also ought as its own verb.  

She ought advise him before the presentation.  

She ought to advise him before the presentation. 

IS SWAT JUST MAKE CONTACT OR BRUSH AWAY TOO?

LINGUEE SAYS MATAR OR PEGAR.  

is this correct grammar? 

we preferreed Argentina win = ok, or  

We preferred Argentina. .

explain this: 

spain has a lot of castles, but not so many as churches

spain has a lot of castles, but not as many as it does churches.