语法指南

什么是频率副词？

频率副词表示一个动作发生的频率。

常见的频率副词包括：

• always — 每次都
• usually — 大多数时候
• often — 多次
• sometimes — 有时
• rarely — 很少
• hardly ever — 几乎从不
• never — 从不

这些词在不提供确切数字的情况下描述频率。

何时使用

用频率副词来谈论习惯、日常活动和重复发生的动作。

• I usually drink coffee in the morning.
• She often walks to work.
• They never eat meat.

它们通常与 Present Simple 一起使用，因为这个时态描述经常发生的动作和习惯。

有些表达会给出更准确的频率：

• every day
• once a week
• twice a month
• three times a year

这些表达通常放在句首或句末。

• I exercise three times a week.
• Every Friday, we order pizza.

结构

与大多数动词连用

把频率副词放在主要动词前面。

主语 + 频率副词 + 主要动词

• We sometimes play tennis.
• He rarely drives at night.

与动词“be”连用

把频率副词放在动词 be 后面。

主语 + be + 频率副词

• He is never late.
• We are usually at home on Sundays.

与助动词和情态动词连用

把副词放在第一个助动词或情态动词后面。

主语 + 助动词或情态动词 + 副词 + 主要动词

• She can always help you.
• I have never seen that film.
• They do not usually work on weekends.
• He will often call in the evening.

Sometimes、usually 和 often

Sometimes、usually 和 often 也可以出现在句首。

• Sometimes, I walk to work.
• Usually, we eat dinner at home.
• Often, she reads before bed.

Sometimes 也可以出现在句末。

• I cook dinner sometimes.

Never

Never 本身就有否定意义。不要把它和 not 连用。

• I never smoke.
• She is never rude.

例子

1. I always check my email in the morning.
2. She usually takes the bus to work.
3. We often cook dinner together.
4. He sometimes forgets his keys.
5. They rarely go to restaurants.
6. My parents hardly ever travel in winter.
7. I never drink coffee at night.
8. She is always friendly to customers.
9. We are usually busy on Mondays.
10. He can often solve difficult problems.

例外

有些频率表达不遵循通常的副词位置。

像 every day、once a week 和 three times a month 这样的表达通常放在句首或句末。

• I call my parents once a week.
• Every morning, she goes for a walk.

副词 sometimes 可以放在主要动词前、句首或句末。

• I sometimes work from home.
• Sometimes, I work from home.
• I work from home sometimes.

常见错误

1. Incorrect: I go always to work by bus. Correct: I always go to work by bus. Explanation: 把副词放在主要动词前面。

2. Incorrect: She always is tired. Correct: She is always tired. Explanation: 把副词放在动词 be 后面。

3. Incorrect: He does never eat breakfast. Correct: He never eats breakfast. Explanation: Never 本身就有否定意义，所以不要把 does 用作否定助动词。

4. Incorrect: They don't never arrive late. Correct: They never arrive late. Explanation: 不要把 not 和 never 一起使用。

5. Incorrect: I am drink usually coffee. Correct: I usually drink coffee. Explanation: 在 Present Simple 中，不要在主要动词前使用 am。

6. Incorrect: She can drive always safely. Correct: She can always drive safely. Explanation: 把副词放在情态动词 can 后面。

7. Incorrect: We go to the gym often every day. Correct: We go to the gym every day. Explanation: 当一个频率表达已经足够时，避免使用两个频率表达。

8. Incorrect: He never is late. Correct: He is never late. Explanation: 与动词 be 连用时，把副词放在动词后面。