Both and both of

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Both means the one and also the other of two persons/things etc.

Both and both of

Before a noun with a determiner (the, this, my, your, those etc.) both and both of are both possible. In American English, both of is common.

Before a personal pronoun we use both of. Note that both of is followed by the object form of the pronoun.

Note that both of us/you/them can be the subject or object of a clause.

Both can be put after pronouns used as objects.

Both and neither

To mean 'none of the two', we use neither, not both---not.

We often drop the or a possessive after both.

Position of both

When both refers to the subject of a clause, it can go with the verb. It is put after auxiliary verbs and before other verbs. When there are two auxiliary verbs, both usually goes after the first.

Note that these meanings can also be expressed by using the structure both (of) + noun/pronoun.

Both --- and ---

The same kind of words or expressions usually follow both and and.

See Also

Back and Again
Bath and bathe
Beat and win
Because of, due to, owing to and on account of
Before and in front of
Begin and Start
Belong to, belong on and belong in
Below and under
Between and among
Between and during
Between and from
Big, large and great
A bit
Born and borne
Bring and take
But, though, in spite of, despite
By and with