错误1.动词原形做主，宾，表，宾补等名词性的成分，例如：Swim is my favorite sport. My goal is pass the exam.

改正为：Swimming is my favorite sport. My goal is to pass the exam(注意goal, purpose, dream 等词表示尚未实现的动作，要用不定式).
错误2.There be 和 has用法混淆，例如：There have a lot of trees in the park.
改正为：There are a lot of trees in the park. 或者The park has a lot of trees in it.
错误3.可数名词单独使用，例如：Cellphone is useful. I like playing computer game.
可数名词单数不要单独使用哦，可以改为复数指类别，如：
Cellphones are useful. I like playing computer games. 也可以在单数可数名词前加上限定词如this，that;代词所有格如 his, her; 或者加上冠词the, a, an.
错误4.主谓不一致，例如：She don’t know what to do.
动词的三单形式*是容易被忽略，改正为：She doesn’t know what to do.