Unit 2 This is my sister.
1. 介绍他人
1) This / That is．．．这／那位是．．．．．． ２）These / Those are．．．这／那些是．．．．．． This is my friend Jane.这（位）是我的朋友简 That is my grandfather. 那(位)是我的祖父。 These are my brothers. 这些是我的兄弟。 Those are my parents. 那些是我的父母。
2. This is my friend. 复数 These are my friends. That is my brother. 复数 Those are my brothers. 3. Who’s she? 她是谁？ She’s my sister. 她是我妹妹。 Who’s he? 他是谁？ He’s my brother. 她是我哥哥。 Who’re they? 他们是谁？ They’re my grandparents. 他们是我的祖父母。
Who’s = Who is Who’re = Who are She’s = She is He’s = He is They’re =They are
4. Oh, Jane, this is my sister Kate. 噢，简，这是我的妹妹凯特。 my sister Kate 我的妹妹凯特，其中my sister 和Kate 指同一个人，Kate用来进一步说明my sister，是 my sister的同位语 5. Have a good day! 愿你们（一天）玩得高兴！（该句用于表达祝愿，
祝愿对方一天里有好的心情和运气。Day还可用morning, afternoon, evening等词语代替。
Have a good evening, you two! 祝你们俩晚上玩个痛快！ 8. You, too. 你（们）也一样。
11. the photo of your family = your family photo
12.Here are two nice photos of my family.这有两张我家人的漂亮照片。
Here are …表示“这是……；这（儿）有……”，用于介绍或引入话题，也可用Here is … 来表示单数的概念。 Here is your book. 这是你的书