Both
We use both to refer to two things or people together:
- Both those chairs are occupied, I’m afraid. (The two chairs are occupied.)
- Are both your parents going to Chile? (Are your mother and father going to Chile?)
Both with nouns
When we use both before a determiner (e.g. a/an, the, she, his) + noun, both and both of can be used:
- She knew both my children. (or … both of my children.)
- Both her brothers are living in Canada. (or Both of her brothers …)
We can use both before a noun:
- This button starts both engines at the same time. (or … both of the engines …)
- Are both cats female?
Both with pronouns
Pronoun + both
We can use both after a subject pronoun or an object pronoun:
- We both prefer classical music.
- Let’s open them both now.
Both of + object pronoun
When we use both as part of a subject or object which is a pronoun, it may be followed by of + an object pronoun:
- We both dislike soap operas. (subject pronoun + both) or Both of us dislike soap operas. (both + of + object pronoun)
- She looked at both of us.
We usually use both of + object pronoun after prepositions:
- He shouted at both of them. (preferred to He shouted at them both.)
- That’ll be so nice for both of you. (preferred to That’ll be so nice for you both.)
Both as a pronoun
We can use both on its own as a pronoun:
- There are two youth hostels in the city. Both are described as expensive, dirty, with poor lighting and poor security.
- Applicants for this course must speak French or German, preferably both.
Both: position
If both refers to the subject of a clause, we can use it in the normal mid position for adverbs, between the subject and main verb, after a modal verb or the first auxiliary verb, or after be as a main verb:
- They both wanted to sell the house. (between the subject and the main verb)
- They had both been refused entry to the nightclub. (after the first auxiliary or modal verb)
- They were both very nice, kind and beautiful. (after be as a main verb)
- Not:
They both were very nice…
- Adverbs
Both in short answers
We use both on its own in short answers:
- A: Would you like something to drink?
- B: A coffee and a tea, please.
- A: Both*?*
- B: Yeah, one for me and one for Brenda. She’s joining us in a minute.
- A: Are you working on Monday or Wednesday next week?
- B: Both*!*
- Not:
The both.
Both of or neither of in negative clauses
We usually use neither of rather than both of … not in negative clauses:
- Neither of them can swim. (preferred to Both of them can’t swim.)
- Neither of my brothers lives at home any more. (preferred to Both of my brothers don’t live at home any more.)
When a negative verb is used, we use either (of). In informal speaking, we often use a plural verb after either, even though it is a singular word:
- She didn’t like either dress. (She looked at two dresses.)
- A: Are Yvonne and Lesley both coming?
- B: We don’t know if either of them are coming. (or, more formally, … if either of them is coming.)
- Either
Both … and as a linking expression
We use both … and to emphasise the link between two things. This makes a stronger connection than and alone:
- Both Britain and France agree on the treaty. (stronger link than Britain and France agree on the treaty.)
- She played both hockey and basketball when she was a student. (stronger link than She played hockey and basketball when she was a student.)
- Conjunctions
Both: typical errors
We don’t use both with a negative verb; we use either instead:
- There was not a considerable difference in percentages for either sex in terms of having a Bachelor’s degree.
- Not:
There was not a considerable difference in percentages for both sex in terms of having a bachelor’s degree.
When we use the verb be as a main verb, both comes after the verb:
- These films are both famous with people of all ages …
- Not:
These films both are famous…