这些词说的是 多久一次，从次数最多到最少：
always — 每次都
usually — 几乎每次
often — 很多次
sometimes — 有些日子，但不是大多数
rarely — 几乎从不
never — 一次也没有
每个词是什么意思
I always brush my teeth. (every day)
She usually walks to school. (almost every day)
We often eat rice. (many days)
He sometimes plays games. (on some days)
We rarely eat out. (almost never)
They never drink coffee. (not one time)
Not "sometimes = every time" — say "sometimes = on some days, not most". sometimes 在中间：比 never 多，比 often 少。
试一试: 🎾 MEI'S WEEK
Monday — tennis
Tuesday — free
Wednesday — free
Thursday — tennis
Friday — free
Saturday — free
Sunday — free
Lars: Two days out of seven. So Mei ___ plays tennis. (sometimes / always / never) 答案: sometimes — 一周七天里有两天，是有些日子，不是大多数日子，所以是 sometimes。Always 是七天全都有，never 是一天也没有。
放在动作词前面
always, usually, often, sometimes, never 这些词说的是多久一次。把它们放在动作词 前面。
She eats breakfast. → She always eats breakfast.
They watch TV. → They never watch TV.
I play tennis. → I sometimes play tennis.
Not "I eat always breakfast." — say "I always eat breakfast.". 频率词放在动作词（eat）前面，不是后面。
试一试: She wakes up early. 把这些词排好顺序。 答案: She usually wakes up early. — 频率词紧跟在动作词 前面：She usually wakes up early. 不是 "She wakes up usually early."
放在 am / is / are 后面
但如果是 am, is, are，这个词要放在 be 动词 后面。
She is late. → She is usually late.
I am happy. → I am always happy.
They are busy. → They are often busy.
Not "She always is late." — say "She is always late.". 有 is 的时候，频率词放在它 后面，不是前面。
试一试: He is hungry. 把这些词排好顺序。 答案: He is often hungry. — 在 be 动词 is 后面，紧接着就是频率词：He is often hungry. 用 am/is/are 时，这个词放在后面，不放前面。
never 本身就是否定
never 已经让句子变成否定了，所以不要再加 do not / does not：I never eat meat.
I never eat meat.
They never drink coffee.
She never walks to work.
Not "I don't never eat meat." — say "I never eat meat.". 一个 never 就够了。再加上 don't，就等于把否定说了两遍。
试一试: Camila: I don't never drink coffee. Wei: You mean ___ 补全 Wei 的这句话。 (you never drink coffee. / you don't never drink coffee. / you not never drink coffee.) 答案: you never drink coffee. — Never 本身就是否定词，所以句子里只要它一个就够了，别的都不用加：you never drink coffee.
试一试: Yasmin: Is Lars awake this early? Mateo: Not really. He ___ tired in the morning. 补全 Mateo 的回答。 (is always / always is / is being always) 答案: is always — Tired 跟 is 搭配，而在 am / is / are 后面紧接着就是频率词：he is always tired.