请找出下列句子中的错误,并改成正确的句子.

问题描述:

请找出下列句子中的错误,并改成正确的句子.
1.He is a old man.2.I haven' t find my cat.3.I reading a story book.4.He name is jack.5.Don' t is late next time.

1.a 改为 an
2.find 改为 found
3.在reading前加上am
4.he 改为his
5.is 改为 be