We use both, neither and either when we are talking about two things. You can use these words with a noun:
●Both restaurants are very expensive. (Not the both restaurants)
●Neither restaurant is expensive.
●We can go either restaurant. I don’t care. (Either=one or the other; it doesn’t matter which one)
●I didn’t like either restaurant. (Not the one or the other)
You can also use both/neither/either with of….When you use these words with of; you always need the/these/those/my/yours/his, etc. You cannot say, “Both of restaurants.” You have to say “Both of the restaurants,” etc.:
●Both of these restaurants are very good.
●Neither of the restaurants we went to, was (or were) expensive.
●We can go to either of those restaurants. I don’t mind.
With both you can leave out of. So you can say:
Both my parents or
Both of my parents
After both of / neither of / either of you can also use us/them/you:
●Can either of you speak Spanish?
●I wanted Tom and Jim to come, but neither of them wanted to.
You must say: “both of” before us/you/them:
●Both of us were very tired. (Not both us…)
After neither of…you can use a singular or a plural verb:
●Neither of the children wants (or want) to go to bed.
●Neither of us is (or are) married.
You can say both…and…, neither…nor…, and either…or… Study these examples:
●Both Tom and Jack were late.
●They were both tired and hungry.
●Neither Jill nor Jane came to the party.
●He said he would contact me, but he neither wrote nor called.
●I’m not sure where he is from. He’ll either Spanish or Italian.
●Either you apologize or I’ll never speak to you again.
You can also use both/neither/either alone:
● “Is he British or American?” “Neither. He’s Australian.”
● “Do you want tea or coffee?” “Either. It doesn’t matter.”
●I couldn’t decide which one to choose. I liked both.