Sometimes the child sleep during the day.这句话错在哪里?

Sometimes the child sleep during the day.这句话错在哪里?
Sometimes the child sleep during the day.
这句话错在哪里?

Sometimes the child sleep during the day.这句话错在哪里?
the child 第三人称单数
sleep 要加s

Sometimes the child sleeps during the day.
child单数 谓语动词用三人称单数。