Question

Each one of these books had been/ have been read by her at least twice​

Answer 1

Each of these books has been read by her at least twice​

Finding the error

• In these types of questions, a sentence is given with an error and we are required to correct it.

• So, the first thing we need to do is to look for the coordination of subject and verb i.e. they are correctly used in accordance with each other.

• In this sentence, the subject seems to be plural, "those books" but actually we are talking about "each one of these books" which is singular. So, the verb will be used according to the singular subject.

• Therefore, according to the singular subject, the correct verb is "has".

Final Answer

Each one of these books has been read by her at least twice​.

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Answer 2

Answer:

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.