副词
副词是用于进一步修饰和描述动词的词。
形容词可以通过在词尾加**ly**的方式改写为副词。
以**y**结尾的形容词，则需要把**y**变成**i**，再加**ly**。
- hard, fast, late 和 early 即是形容词，也是副词。
- good 的副词变化不规则，它的副词形式是 well。
用法：
副词既可以放在句子的开头，也可以放在句子中间和句子末尾。
放在句子开头的副词，通常与上一句话有所关联，它或者指涉上一句的内容，或者指涉上一句话发生的时间或地点。如：
such as, as a result, in the office 和 finally 等。
在句中的副词通常描述行为的程度、重点以及频率。如：
quite, very much, just 及 even 等。
表示时间的副词通常放在句尾。
例文：（副词和副词短语已加粗）
Although Green Toothpaste has been using all-natural ingredients for years, sales have dropped unexpectedly in the last six months. As a result, Green Toothpaste has decided to hire a market research company. After conducting surveys and thoroughly researching the market, the consultants finally identified a shift in demand among toothpaste users. In a presentation at Green Toothpaste's headquarters, the consultants briefly outlined the shift and then very cautiously recommended targeting a different market segment and making the organic ingredients a unique selling point. After some discussion, the recommendations were accepted and plans for a new marketing campaign were carefully considered.
表示程度的副词在句中置于形容词、动词及其它副词之前。这类副词主要有：
extremely, really, slightly, totally 和 almost 等
副词 very, very much 和 too 也可以这样使用。但是 very 从不用于修饰动词。
