这个有什么语法错误吗?Bill is a middle school student.He likes playing

Bill is a middle school student.He likes playing computer games,but his mother doesn’t allow him to play .because sometimes he can’t stop himself,his mother said to him:"If you want to play computer games,you can think 'My mother may be behind me.'"
One day,Bill's mother wasn’t at home.So Bill played computer games at once.An hour later,Bill suddenly saw in the mirror that his mother was behind him,his mother said:"I have told you,I may be behind you."
Question:
(1)Why Bill’s mother doesn’t allow him?Because sometimes Bill can’t stop himself .
(2)Who is behind Bill?His mother.
because ,so 不要一起用.
句子要简练.his mother doesn’t allow him to play
注意前后一致 may be behind ,may behind

尽量不要写长句子，除非很有把握。最后注意单词拼写不要错了，单复数不要错了。 "Some people always think that eating less means you can not

Bill is a middle school student. He likes playing computer games, but his mother doesn’t allow him to play computer games, because sometimes he can’t stop playing it. So his mother said to him: "When ...

没有语法错误！