七年级上册Unit 3 Is this your pencil? 语法重难点讲解 ,否定回答 ,that,these,those 的用法 3 重难点讲解 pen eraser ruler pencil schoolbag a pencil box a pencil box a dictionary a schoolbag a book an eraser ---What’s this in English? ---It’s a / an … English dictionary schoolbag ruler book This is a ruler. -- Is this a ruler? -- Yes, it is. These are rulers. -- Are these rulers? -- Yes, they are. That is my schoolbag. -- Is that your schoolbag? -- No, it isn’t. -- No, they aren’t. Those are my schoolbags. -- Are those your schoolbags?