一、主格宾格使用有误

托福口语练习中最常见的情况是本该用形容词性物主代词(比如their)，结果误用了代词的主格或宾格(比如用成了they或者them)，或者在主格和宾格之间未能区分清楚(比如分不清they和them)。一个典型的例子是“Some graduates are proud of their diplomas; however， companies regard they as nothing.”。句中regard后面应接宾语，所以they应该改为them才对。

二、托福口语中代词的频繁转换

典型的例子是“When one searches on the Internet， you will potentially get onto illegal websites，which will cause negative consequences to us.”在这句话中one，you和us未能保持一致，让考官不知所云。应该修改为“When searching on the Internet，we may potentially get onto illegal websites，which will cause negative consequences to us.”