That is a book. 疑问句: Is that a book? 否定回答: No,it isn't. This is my dictionary. 一般疑问句: Is this your dictionart? 肯定回答: Yes ,it is. That's an English book.English book 是划线部分吧? 提问句: What's that? 连词成句 Excuse me,is this your pencil box?
1. Is that a book? No, it isn't. 2. Is this your dictionary? Yes, it is. 3. 应该是对an English book划线部分吧?那么改成: What is that? 4. Excuse me, is this your pencil box? (你应该是题中的your打成了you吧?)