'too' in negative sentence

"Too" in negative sentences: How can I define it?

(Hello everyone,

I learned that "too" can be used by native speakers in negative sentences. I know that it's a non-standard use. My question is: how can I define "too" in this case?

a. Used in colloquial English

b. Used in colloquial English but not recommended

c. Even though it occurs in natural English, it is a bad use of "too" which nobody should copy.

Ex.: I don't want to stay here too.

I personally prefer letter (c). And you? What do you think?

Thank you in advance!)

• I'd say I don't want to stay here either. I suppose on that criterion (c) is right.

• "I don't want to stay here too" is unusual, but it is a valid sentence, a direct contradiction to "I (do) want to stay here too":
  
  We have stayed overnight at every town we have been to on this trip, and I don't want to stay here too.
  Jack and Jill both want to stay here. I don't want to stay here too, because there is not really room here for more than two people.
  
  But it is not a substitute for "I don't want to stay here either", which is used to add information to a negative:
  
  I didn't want to stay there, and I don't want to stay here either.
  He doesn't want to stay here, and I don't want to stay here either.
  
  This last idea may also be expressed using too, but it has to be outside the negative predicate:
  
  I too don't want to stay here.

too in negative sentences?

(Can we use too in negative sentences.

John wasn't at home, and Tim wasn't too.

I though only "either" was used in negative sentences)

• You're right, 'too' is not normally used here.
  
  In addition to 'either', you could say 'neither John nor Tom was at home'.
  
  Best wishes, Clive