Question

each one of those books have been read by her at least twice​

Answer 1

She has read each one of the books at least twice.

Answer 2

Each one of those books has been read by her at least twice. -This is the answer.

Rectifying error:

• In the question given, we must find out the error in it and also correct it.
• When we are given a sentence to spot the mistake, we must check if there is agreement among the parts of speech in it.
• Especially, the agreement between subject and verb must be looked into. In other words it is called concord.
• In the sentence the subject is 'each one of those books'. Though, those books is in plural form, we are talking about only one book. It says, 'each one of...', which means we have to consider only one book out of the total.
• Thus the book is singular here and so the verb must also be in singular.
• So there is an error in 'have been read'. It should be 'has been read' -the singular form.
• Therefore the answer is: Each one of those books has been read by her at least twice.