In the following sentence, why is the passive construction used? According to the author, the book was written in only three weeks.

Question

In the following sentence, why is the passive construction used?  According to the author, the book was written in only three weeks.

Answer

because the actor of the verbal action is not known

Answer

to focus attention on  the book

Answer

to focus attention on the actor of the verb  to write .

Answer

because the verb  write  has no subject

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