主謂不一致，人稱與動詞不符。
例如：
My sister go to the cinema at least once a week. (誤)
My sister goes to the cinema at least once a week. (正)
上面例句中，主語是My sister ，為第三人稱，所以謂語動詞應該用第三人稱單數形式goes才正確，這種主謂不一致的錯誤在寫作中是很常見的問題，稍一疏忽就會犯，考生需要更加細心才行。
句子成分殘缺不全，語句不通。
例如：
We should read books may be useful to us. (誤)
We should read books which may be useful to us. (正)
這是一個定語從句的例句，其中which在從句中做的是主語，所以不能省略，一旦省略就會造成句子成分殘缺，考試中大家在寫完一句話時要記得讀一遍看看通不通順。
句子成分多餘，累贅複雜。
例如：
This test is end, but there is another test is waiting for you. (誤)
One test ends, but another is waiting for you. (正)
這一句的.錯誤有點中式英語的味道，逐字逐句對應翻譯，there is 放在這裡，累贅而又繁瑣。
動詞時態、語態的誤用，前後不一致。
例如：
I was walking along the road, and there are not so many cars on the street. (誤)
I was walking along the road and there were not so many vehicles on the street. (正)
這個例句中前面是was walking ，所以後面也要用相應的過去進行時were，同一個句子裡，沒有特殊情況，前後時態時要保持一致的。
We have little time to read some books which we interest. (誤)
We have little time to read some books in which we are interested. (正)
這一句也可以說是定語從句語法錯誤，be interested in是我們都知道的固定搭配，所以它後面跟賓語一定要有介詞in，所以從句引導詞要用 in which 。
