I must water you must water he must water we must water you must water they must water
Forma con V-ing
I must be watering you must be watering he must be watering we must be watering you must be watering they must be watering
Perfecto
I must have watered you must have watered he must have watered we must have watered you must have watered they must have watered
Perfecto con V-ing
I must have been watering you must have been watering he must have been watering we must have been watering you must have been watering they must have been watering
Negación
Forma simple
I must not water you must not water he must not water we must not water you must not water they must not water
Forma con V-ing
I must not be watering you must not be watering he must not be watering we must not be watering you must not be watering they must not be watering
Perfecto
I must not have watered you must not have watered he must not have watered we must not have watered you must not have watered they must not have watered
Perfecto con V-ing
I must not have been watering you must not have been watering he must not have been watering we must not have been watering you must not have been watering they must not have been watering
Forma interrogativa
Forma simple
must I water? must you water? must he water? must we water? must you water? must they water?
Forma con V-ing
must I be watering? must you be watering? must he be watering? must we be watering? must you be watering? must they be watering?
Perfecto
must I have watered? must you have watered? must he have watered? must we have watered? must you have watered? must they have watered?
Perfecto con V-ing
must I have been watering? must you have been watering? must he have been watering? must we have been watering? must you have been watering? must they have been watering?
Forma interro-negativa
Forma simple
must I not water? must you not water? must he not water? must we not water? must you not water? must they not water?
Forma con V-ing
must I not be watering? must you not be watering? must he not be watering? must we not be watering? must you not be watering? must they not be watering?
Perfecto
must I not have watered? must you not have watered? must he not have watered? must we not have watered? must you not have watered? must they not have watered?
Perfecto con V-ing
must I not have been watering? must you not have been watering? must he not have been watering? must we not have been watering? must you not have been watering? must they not have been watering?