please correct me or write somthing ,thanks

put his/her shoes on ,when you want to laugh at somone's walking ......

We have two English idioms that would apply to this sentence. They both mean to imagine yourself in that person's place before you judge them.     

-Put yourself in his shoes

- Walk a mile in his shoes

Put yourself in his shoes before you go laughing at him.

Before you laugh at someone's misfortune walk a mile in their shoes.

Put yourself in their shoes when you want to laugh at someone walking.