1. 查看时态是否一致

　　My favorite sport is football. I was a member of our football team.

　　全文都是用的一般现在时，此句中的was显然与上下文语境不符，应改为am。

　　2. 查看主谓是否一致

　　Anyone may borrow books, and it cost nothing to borrow them.

　　cost应改为costs，因其主语是it(为形式主语)，且上下文均为一般现在时。

　　3. 查指代是否一致

　　The Smiths did his best to make me feel at home.

　　句中的主语the Smiths表的是Smith一家人，因此指示代词his应改为their。

　　4. 查平行结构是否平行一致

　　由and, or, but, either...or..., neither...nor..., not only...but also..., as well as等并列连词和词组连接的结构可称为平行结构。

　　It was very kind of them to meet me at the railway station and drove me to their home.

　　句中的drove显然与and前面的to meet不平行，应改为drive。

　　5. 查名词的单复数与修饰词语或上下文是否一致

　　We study quite a few subject, such as Maths, Chinese...

　　quite a few 只能修饰复数名词，故subject应改为subjects。

　　6. 查行文逻辑是否一致

　　Most people can quickly get help from a doctor or go to a hospital sincethey are ill.

　　根据行文逻辑，这里不该由since来引导原因状语从句，而应是when / whenever或if来引导时间或条件状语从句。