是用This have a book 还是用This is a book 在表示这有一本书时

是用This have a book 还是用This is a book 在表示这有一本书时 是用this is a book of english 还是用this is a book with english "this is a book" a book是宾语还是表语? This is a book this is a new book 其中的表语是book还是a new book This is a book.对book 提问时what is it 对,还是what is this? This is s book.(a book提问) Is this a book?" "Yes,this is." this is a book 提问 This is a interesting book This is (a math) book. this is a book.反问句是Is this a book?