Sentences with Modal VerbsChildren must obey their parents.Parents should respect their children too.Challenges must not keep us from achieving our dreams.Parents have to send their children to school.Before one talks about an issue, he/she should read about it first.Family members must understand that they have important roles to perform in keeping the family strong.Friends ought to be carefully chosen for the influence they can have.The school, as a second home, must constantly nurture and protect the rights of children.At school, we have to wear our uniform.You should visit us more often; we have a lot of stories to share.