情景导入
体育课自由活动时间，外教 Mr. Green 走过来问你：How often do you exercise?（你多久锻炼一次？）
你每天傍晚都绕着小区跑两圈，周末还去打羽毛球，可以这样回答：I run every day, and I play badminton twice a week.（我每天跑步，每周打两次羽毛球。）
想把"每天""每周三次""几乎不"说清楚，就要用好本单元的主角——频率副词和 how often 句型。
核心词汇
运动项目：
| 短语 | 意思 | 短语 | 意思 |
|---|---|---|---|
| play basketball | 打篮球 | play badminton | 打羽毛球 |
| go running | 去跑步 | go swimming | 去游泳 |
频率表达（从多到少）：
| 词/短语 | 意思 | 例句 |
|---|---|---|
| always | 总是 | I always walk to school. |
| usually | 通常 | She usually exercises after dinner. |
| often | 经常 | We often play ping-pong. |
| sometimes | 有时 | Sometimes I go swimming. |
| never | 从不 | I never stay up late. |
| once / twice a week | 每周一次/两次 | I run three times a week. |
句型与语法
一、how often 问频率
- — How often do you play basketball? （你多久打一次篮球？）
- — Twice a week. （一周两次。）
回答频率的公式：次数 + a + 时间单位：once a day（一天一次）、twice a month（一月两次）、three times a year（一年三次）。一次是 once，两次是 twice，三次及以上才用 times。
二、频率副词的位置
- 在行为动词之前：I often play soccer after school.
- 在 be 动词之后：He is always full of energy.
口诀：行前 be 后。
听说训练
运动习惯采访（用 how often 采访三位同学）：
- How often do you exercise? — I exercise every day. / Three times a week.
- Do you think exercise is important? — Yes! It keeps me healthy and happy.
跟读要点：how often 连读时 how 的尾音滑向 often；usually 读作 /ˈjuːʒuəli/，注意中间的 /ʒ/ 音。
辨析对比
① how often vs how long
- How often do you swim? — Twice a week. （问频率：多久一次）
- How long do you swim each time? — For an hour. （问时长：多长时间）
② play + 球类 vs play + the + 乐器
- play basketball / play soccer（球类不加 the）
- play the piano / play the guitar（乐器要加 the）
文化角
英语里有句谚语：An apple a day keeps the doctor away.（一天一苹果，医生远离我。）西方校园同样重视锻炼，很多美国中学生放学后参加 after-school sports（课后体育社团），如棒球（baseball）、橄榄球（football）。而在杭州，晨跑西湖、夜骑钱塘江边绿道，也是很多家庭的"保持健康"方式。
易错点
- once/twice 用错：two times a week 虽能听懂，但地道说法是 twice a week；"一次"必须用 once。
- 频率副词位置：I play always basketball. ❌ → I always play basketball. ✅（行前 be 后）
- 三单漏 s：He often go swimming. ❌ → He often goes swimming. ✅
中考真题
— ______ do you play badminton with your father, Tony?
— Twice a week. It helps me keep fit.
A. How long B. How often C. How far D. How soon
✏️ 点击查看解答
答案：B
解析：答语 Twice a week（一周两次）说的是频率，问频率用 How often（多久一次）。
A 项 How long 问"多长时间"，答语应为 for an hour 之类；C 项 How far 问"多远"；D 项 How soon 问"还要多久"，答语常为 in + 时间段。
考点
- how often 与 how long / how far / how soon 的辨析是七下最高频单选考点之一；
- 频率副词的位置（行前 be 后）常在语法填空和改错题中考查，写作"我的健康生活方式"常考：用 always / usually / three times a week 展示句式多样性即可加分。
诵读 Read Aloud
I am a middle school student in Hangzhou, and I have a healthy lifestyle. I always get up at six thirty and do morning exercises at school. After school, I often play basketball with my classmates for half an hour. I go running around the West Lake with my father twice a week, and sometimes we ride bikes along the Qiantang River. I hardly ever stay up late, and I never skip breakfast. Exercise makes me strong and happy. If you want to keep fit, come and join me!
诵读小贴士：朗读时给频率副词（always, often, sometimes, never）稍稍重读，语流会更自然；背熟这段范文，"健康生活"类作文可直接套用。