Soo, Too, Either, Neither

So
Is used to show agreement with positives statements.

SO + Auxiliary + Subject

Example :

-Lova likes playing guitar. Shandy also likes playing guitar.

-Lova likes playing guitar and so does Shandy

Too

Is used when the verb is in the affirmative form

Subject + Auxiliary verb + Too

Example :

-Nadya likes playing football and Ruko does too.

Either

Is used when the verb is in the negative form.

Subject + Auxiliary verb + not + either

Example:

-They do not go to canteen everyday. Sri does not go to canteen everyday.

-They do not go to canteen everyday and Erna does not either

Neither

Is used to show agreement with negative statements.

Neither + Auxiliary verb + Subject

Example :

-They do not go to canteen everyday, neither does Sri