POSITIVE  (me too)
"I'm married."  		So am I.		I am too.
"I was sick."      		So was I.		I was too.
"You were sick."		So were you.	You were too.
"I have a new car." 		So do I.		I do too.
"I went to the party."	So did I.		I did too.
"I will go out."		So will I.		I will too.
"I would buy it."		So would I.	I would too.
"I could buy it."		So could I.	I could too.
"I can do it."		So can I.		I can too.
"I should go."		So should I.	I should too.
"I have talked to him."	So have I.		I have too.

NEGATIVE  (me neither)
"I'm not married."  		Neither am I.	I am not either.
"I was not sick."      		Neither was I.	I wasn't either.
"You weren't sick."		Neither were you.	You weren't either.
"I don't have a new car." 	Neither do I.	I don't either.
"I didn't to the party."	Neither did I.	I didn't either.
"I will not go out."		Neither will I.	I will not either.
"I wouldn't buy it."		Neither would I.	I wouldn't either.
"I couldn't buy it."		Neither could I.	I couldn't either.
"I can't do it."		Neither can I.	I can't either.
"I shouldn't go."		Neither should I.	I shouldn't either.
"I haven't talked to him."	Neither have I.	I haven't either.