名詞、動詞、形容詞、副詞怎麼輕鬆分辨？
英文單字裡面面相關的單字變化叫做「word families 單字家人」。單字家人裡面有分名詞、動詞、形容詞、和副詞，通常能透過字尾判斷。
1.名詞字尾包含: -ance, -ancy, -ence, -ency, -ation, -dom, -ism, -ment, -ness, -ship, -or, -ion.
例如：performance, agency, employment, wisdom, satisfaction, excitement, information, scholarship, fashion, etc.
例句：
We have profited from his employment.
Wisdom comes with age and experience.
2. 動詞字尾包含: -ate, -en, ify, -ize.
例如： strengthen, simplify, specialize, skate, etc.
例句：
This client will strengthen our credibility.
We really need to simplify the work process.
3. 形容詞字尾包含: -able, -ible, -al, -ful, -ish, ive.
例如：beautiful, reliable, creative, electrical, accessible, foolish.
例句：
His business is not very successful.
This is the most constructive plan we have come up with.
4. 副詞字尾包含：-ly, -word, -wise.
例如：professionally, sidewise.
例句：
The presentation was given professionally.
He tends to approach problems sidewise.
以上，記起來，遇到相似詞時就能利用字尾來判斷詞性囉！