副词是英语中八大词类之一，主要用来修饰动词，描述某动作的方式、时间、频率、程度或地点。它们使我们能够更准确地表达信息。以下是五种副词的详细说明。
方式副词用来描述某人如何执行一个动作，通常与动词紧密结合。这类副词可以位于句子的末尾，或直接放在动词前后。例如：
slowly, fast, carefully, carelessly, effortlessly, urgently
等。
Examples
Jack drives very carefully.
He won the tennis match effortlessly.
She slowly opened the present.
时间副词则提供了有关动作发生时间的信息。这些副词可以是特定的时间点，如two days ago、yesterday或three weeks ago。它们通常放在句末，但有时也位于句首。例如：
Examples
We'll let you know our decision next week.
I flew to Dallas three weeks ago.
Yesterday, I received a letter from my friend in Belfast.
频率副词与时间副词类似，不过它们主要用来描述某事发生的频率。这类副词一般放在主要动词之前，或者在动词be之后。频率副词从最常见到最少见的顺序如下：
always
almost always
usually
often
sometimes
occasionally
seldom
rarely
almost never
never
Examples
He seldom takes a vacation.
Jennifer occasionally goes to the movies.
Tom is never late for work.
程度副词用于描述某事的完成程度，通常放在句子的末尾。例如：
Examples
They like playing golf a lot.
She decided that she doesn't enjoy watching TV at all.
She nearly flew to Boston, but decided not to go in the end.
地点副词则提供有关动作发生地点的信息，常见的有
nowhere, anywhere, outside, everywhere
等。
Examples
Tom will go anywhere with his dog.
You'll find that there is nowhere like home.
She found the box outside.
副词通常是通过在形容词后加上“-ly”来形成的。例如：
quiet - quietly, careful - carefully, careless - carelessly
以“-le”结尾的形容词转变为副词时，会变成“-ly”。例如：
possible - possibly, probable - probably, incredible - incredibly
以“-y”结尾的形容词则变为“-ily”。例如：
lucky - luckily, happy - happily, angry - angrily
以“-ic”结尾的形容词转为副词时，会变成“-ically”。例如：
basic - basically, ironic - ironically, scientific - scientifically
某些形容词转化为副词时是不规则的。例如：
good - well, hard - hard, fast - fast
方式副词:
这种副词通常放在动词之后，或者整个句子的末尾。例如：
Their teacher speaks quickly.
时间副词:
时间副词一般放在动词或句子的最后。例如：
She visited her friends last year.
频率副词:
频率副词放在主要动词之前（不是助动词），有时也放在动词“to be”之后。例如：
He often goes to bed late. Do you sometimes get up early?
程度副词:
程度副词通常放在句子的末尾。例如：
She'll attend the meeting as well.
地点副词:
地点副词一般位于句末。例如：
She walked out of the room to nowhere.
有些副词可以放在句首，以加强语气。例如：
Now you tell me you can't come!
频率副词在句子的主要动词是“to be”时，会放在其后面。有些频率副词（
sometimes, usually, normally
）也可放在句首，以强调。例如：
Sometimes I visit my friends in London.