both

both [ bouθ ] function word, quantifier ***

Both can be used in the following ways:

as a determiner (followed by a noun, but not by a pronoun):

Both children are at school.

as a predeterminer (followed by a word such as the, this, his, etc.):

I like both these pictures.

Both her children are boys.

as a pronoun:

Both arrived at the same time. (followed by of ):

Both of them are learning English. (after a noun or pronoun subject):

The twins both have black hair. (following a pronoun object):

I like them both. (after a modal or auxiliary verb, or after the verb to be ):

We can both speak Spanish.

They are both good singers.

in the expression both...and...:

a method that is both simple and effective

1. ) => NOTE used for showing that you are referring to two people or things, and that you are saying the same thing about the two of them:

Both my parents are doctors.

You can write on both sides of the paper.

There were two separate projects, and both came up with the same results.

She invited us both down for a drink.

both of: Both of the leaders expressed hope that the peace negotiations would continue.

two companies, both of which are owned by News International

2. ) => NOTE both...and... used for emphasizing that each of two things is true:

a plant that grows in both Chile and Argentina

The results of the research are both impressive and alarming.

Both she and her sister now live in New Orleans.

you and me both SPOKEN

used for telling someone that you are in the same situation, have the same problem, etc. as them