[第一類] 名詞類
1. 這些女老師們在幹什麼?
[誤] What are the woman teachers doing?
[正] What are the women teachers doing?
[析] 在英語中，當一名詞作定語修飾另一名詞(單或複數形式)時，作定語的名詞一般要用其單數形式;但當man, woman作定語修飾可數名詞複數形式時，要用其複數形式men, women.
2. 房間裡有多少人?
[誤] How many peoples are there in the room?
[正] How many people are there in the room?
[析] people作人、人們解時，是個集合名詞，其單複數同形。
3. 我想為我兒子買兩瓶牛奶。
[誤] I want to buy two bottle of milk for my son.
[正] I want to buy two bottles of milk for my son.
[析] 表示不可數名詞的數量時，常用a/ an或數詞+表量的`可數名詞+ of + 不可數名詞這一結構，其中當數詞大於1時，表量的可數名詞要用其複數形式。
[第二類] 動詞類
4. 你妹妹通常什麼時候去上學?
[誤] What time does your sister usually goes to school?
[正] What time does your sister usually go to school?
