Either
 
 
 
Either Tom or I must go.
I don't like it, either.
I can't explain it either.
I don't know either of them.
I don't want either of them.
She doesn't understand me, either.
I didn't know you were coming here either.
I'll either write to you or phone you next week.
Susie doesn't speak Japanese, and Tom doesn't either.
I don't have any money and I don't have any friends either.