放风筝
9. three and a half years =three years and a half 三年半
10. a pair of skates/shoes/glasses/trousers/jeans 一双滑冰鞋/一双鞋/一副眼镜/一条裤子/牛仔裤
l How much is a pair of skates/shoes/glasses/trousers/jeans?
= How much does a(this) pair of skates/shoes/glasses/trousers/jeans cost?
l How much are the skates/shoes/glasses/trousers/jeans?
= How much do the skates/shoes/glasses/trousers/jeans cost?
本单元目标句型：
1. How long have you been skating? 你滑冰有多长时间了？
2. I’ve been skating since nine o’clock./since I was four years old.
我从九点一直滑到现在/我从四岁一直滑到现在。
3. I’ve been skating for five hours. 我一直滑了五小时 。
4. The more I learn about Chinese history, the more I enjoy living in China.
我对中国的历史了解得越多， 我就越喜欢住在中国。
本单元语法讲解
现在完成进行时：表示从过去某时开始到现在这一段时间里一直在延续的动作。
现在完成进行式结构：have / has +been+ doing
1．I have been writing the letter since then.从那时起我一直在写这封信。（动作从过去一直持续到现在还在继续）
2．I have been collecting stamps for ten years.自从10年前我就收集邮票了（动作从过去一直现在还在收集）。
3． How long have you been living here?你在这儿已经住了多长时间了。（“居住”动作从过去一直现在还在继续）
Unit 7 Would you mind turning down the music?
1. turn… down/turn… up 关小声/调大声音（电器）
2. turn… on/ turn …off 打开/关闭（电器）
3. move the bike 移动自行车
4. in a minute/right away/in no time 立刻,马上
5. be late for school/class=arrive late for school 上学/上课迟到
6. wait in line=stand in line 排队等候
7. cut in line=jump a queue 插队
8. get mad/annoyed 变得生气
