T：Don't take any aspirins!
S：You mustn't take any aspirins.
T：Don't take this medicine!
S：You mustn't take this medicine.
T：Don't call the doctor!
S：You mustn't call the doctor.
T：Now you do the same. Ready?
T：Don't take any aspirins!
S：You mustn't take any aspirins.
T：Don't take this medicine!
S：You mustn't take this medicine.
T：Don't call the doctor!
S：You mustn't call the doctor.
T：Don't play with matches!
S：You mustn't play with matches.
T：Don't talk in the library!
S：You mustn't talk in the library.
T：Don't make a noise!
S：You mustn't make a noise.
T：Don't drive so quickly!
S：You mustn't drive so quickly.
T：Don't lean out of the window!
S：You mustn't lean out of the window.
T：Don't break that vase!
S：You mustn't break that vase.
S：You mustn't take any aspirins.
T：Don't take this medicine!
S：You mustn't take this medicine.
T：Don't call the doctor!
S：You mustn't call the doctor.
T：Now you do the same. Ready?
T：Don't take any aspirins!
S：You mustn't take any aspirins.
T：Don't take this medicine!
S：You mustn't take this medicine.
T：Don't call the doctor!
S：You mustn't call the doctor.
T：Don't play with matches!
S：You mustn't play with matches.
T：Don't talk in the library!
S：You mustn't talk in the library.
T：Don't make a noise!
S：You mustn't make a noise.
T：Don't drive so quickly!
S：You mustn't drive so quickly.
T：Don't lean out of the window!
S：You mustn't lean out of the window.
T：Don't break that vase!
S：You mustn't break that vase.