★ 重点单词、短语
1. prepare for... 为……做准备
2. go to the doctor 去看医生
3. have the flu 患流感
4. another time其他时间
5. go bike riding去骑自行车
6. be not available 没有空
7. not...until... 直到……才……
8. too much homework 太多家庭作业
9. study for a test 为考试而学习
10. invite sb to do sth 邀请某人做某事
11. the day before yesterday 前天
12. the day after tomorrow 后天
13. look after 照顾
14. turn down 拒绝
15. look forward to 期盼
16. help out 帮忙
17. reply to 回复
18. take a trip 去旅行
19. hear from 收到（某人的）信
20. without telling sb 没有告知某人
★ 重点语法
单元语法重点：can 表示“邀请”。
can 意为“能；会”，是情态动词，可以用 来提出“邀请”。例如：
Can you come to my birthday party tomorrow? 你明天能来参加我的生日聚会吗？
Can you hang out with us tonight? 今晚你能和我们一起出去玩吗？
Can she go to the football game? 她能去看足球比赛吗？
Can you go for a swim with me this afternoon? 今天下午你能跟我一起去游泳吗？
接受邀请时，答句可以是“OK. / Sure. It sounds great. / All right. / Certainly. / Of course. / Sure, I’d love / like to.”或“Yes, I can.”。
拒绝邀请时，答句可以是“I’m sorry, I can’t. I have to... / I’d love to, but I’m afraid I can’t. / Sorry, but I’m not available / free.”。
其他表示“邀请”的句型：
Could / Would / Will you please come to my birthday party?
Would you like / love to come to my birthday party?
I hope you can come to my birthday party.
Please come to my birthday party.
May I ask / invite you to come to my birthday party?
What / How about coming to my birthday party?