Often English language learners confuse the words also and either, when used as adverbs to modify verbs, adverbs or adjectives.
We use also to indicate that we want to talk about another similar thing in a positive sentence. Usually it comes near the beginning of the sentence.
I’m feeling very hungry. I’m also feeling very tired.
I think Fred is coming. Jean is also coming, I think.
Either is used instead of also in negative sentences.
It always comes at the end of a sentence or clause.
She is not hungry, and I’m not hungry either.
I know Fred is not coming, and I don’t think Diane is coming either.
We can also use too and as well in positive sentences, but they come at the end of the sentence.
I’m feeling very hungry. I am feeling very tired as well.
I know Fred is coming, and Jean is too.