book

It is a book.

【Translation】It is a book. 【Explanation】The sentence is structured as [Subject (It) + be-verb (is) + Complement (a book)]. The correct order is 'It is a book.'

【和訳】それは本です。 【解説】語順は【主語 (It) ＋ be動詞 (is) ＋ 補語 (a book)】となります。正しい文は「It is a book.」です。