1. clothes, cloth, clothing
10. a number of, the number of
a number of 許多，謂語動詞用復數
the number of…的數目，謂語動詞用單數
The number of students is increasing.
clothes 統指各種衣服，謂語動詞永遠是復數;cloth 指布，為不可數名詞;
clothing 服裝的總稱，指一件衣服用 a piece of, an article of
2. amount, number
amount 后接不可數名詞;
number 后接可數名詞 a number of students
3. sound, voice, noise
sound 自然界各種各樣的聲音voice 人的嗓音
noise 噪音 I hate the loud noise outside.
4. cause, reason
cause 指造成某一事實或現象的直接原因，后接 of sth./doing sthreason 用來解釋某種現象或結果的理由，后接 for sth./doing sth. The reason for being late.
5. exercise, exercises, practice
exercise 運動，鍛煉（不可數）， exercises 練習（可數），
practice（反復做的）練習 Practice makes perfect.
6. officer, official
officer 部隊的軍官，
official 政府官員 an army officer
7. work, job
work 不可數; job 可數 a good job
8. cook, cooker
cook 廚師; cooker 廚具 He is a good cook.
9. problem, question
problem 常指困難，前面的動詞常為 think about, solve, raise，question 常指疑問，多和 ask, answer 連用clothing 服裝的總稱，指一件衣服用 a piece of, an article of
2. amount, number
amount 后接不可數名詞;
number 后接可數名詞 a number of students
3. sound, voice, noise
sound 自然界各種各樣的聲音voice 人的嗓音
noise 噪音 I hate the loud noise outside.
4. cause, reason
cause 指造成某一事實或現象的直接原因，后接 of sth./doing sthreason 用來解釋某種現象或結果的理由，后接 for sth./doing sth. The reason for being late.
5. exercise, exercises, practice
exercise 運動，鍛煉（不可數）， exercises 練習（可數），
practice（反復做的）練習 Practice makes perfect.
6. officer, official
officer 部隊的軍官，
official 政府官員 an army officer
7. work, job
work 不可數; job 可數 a good job
8. cook, cooker
cook 廚師; cooker 廚具 He is a good cook.
9. problem, question
10. a number of, the number of
a number of 許多，謂語動詞用復數
the number of…的數目，謂語動詞用單數
The number of students is increasing.
