each one
fixed phr..fixed phr.. Every single person or thing in a group, considered individually. You use it to talk about all the members of a group, one by one.
fixed phr.. A pronoun phrase used to refer to every individual member of a previously mentioned or contextually understood group, emphasizing singularity.
I have three pens, and each one works.
She baked a dozen cookies and decorated each one with a different pattern.
The detective examined the clues, noting that the significance of each one only became clear when viewed in relation to the others.
This phrase is always singular and takes a singular verb, like 'is' or 'has'.
Contrast 'each one' with 'all of them'; 'each one' focuses on the individual items, while 'all of them' refers to the group as a whole.
The books are new, and each one have a blue cover.The books are new, and each one has a blue cover.The phrase 'each one' is singular, so it requires a singular verb like 'has', not 'have'.