Fill in the Blanks Can, must, and have toOnline version Complete the conversation with can, can't, have to, or don't have to. by Meredith Franco 1 don't has have have have to to can to to to to can't have have Uncle : So Leo , do you wear a uniform ? Nephew : We wear a uniform from Monday to Thursday but we wear it on Friday . We wear casual clothes on Friday , but some people choose to wear their uniform . Uncle : Do you like your teacher ? Nephew : Yes , but we talk when she's talking . We listen . Uncle : Well , that's good , isn't it ? It's polite . Nephew : I guess so . We all stand up when she enters the classroom - it's a school rule . Then she takes the attendance and one student take the attendance to the school's office .