【第一类】名词类
1. 这些女老师们在干什么?
[误] What are the woman teachers doing?
[正] What are the women teachers doing?
[析] 在英语中，当一名词作定语修饰另一名词（单数）时，作定语的名词一般要用其单数形式;但当man, woman作定语修饰可数名词复数形式时，要用其复数形式men, women.
2. 房间里有多少人?
[误] How many peoples are there in the room?
[正] How many people are there in the room?
[析] people作“人、人们”解时，是个集合名词，其单复数同形。
3. 我想为我儿子买两瓶牛奶。
[误] I want to buy two bottle of milk for my son.
[正] I want to buy two bottles of milk for my son.
[析] 表示不可数名词的数量时，常用“a / an或数词+表量的可数名词+ of + 不可数名词”这一结构，其中当数词大于1时，表量的可数名词要用其复数形式。
【第二类】动词类
4. 你妹妹通常什么时候去上学?
[误] What time does your sister usually goes to school?
[正] What time does your sister usually go to school?
[析] 借助助动词do(或does)构成疑问句或否定句时，句中的谓语动词用其原形。
5. 琳达晚上经常做作业，但今晚她在看电视。
[误] Linda often do her homework in the evening, but this evening she watching TV.
[正] Linda often does her homework in the evening, but this evening she is watching TV.
[析] 在初一英语学习阶段，我们接触到了两种主要时态：一般现在时和现在进行时。一般现在时表示经常的或习惯性的动作，常和often, usually, sometimes 等时间状语连用。在一般现在时的句子中，若主语是第三人称单数，谓语动词要用其第三人称单数形式。现在进行时表示现阶段正在进行或发生的动作，现在进行时由be(am / is / are)+ving形式构成。
6. 这双鞋是红色的。
[误] This pair of shoes are red.
[正] This pair of shoes is red.
[析] 在shoes, trousers, gloves, glasses等表示成双成对的衣物或工具名词前用pair(表计量)修饰时，谓语动词的形式由pair的单复数形式来决定。