I must snowplow you must snowplow he must snowplow we must snowplow you must snowplow they must snowplow
Forma con V-ing
I must be snowplowing you must be snowplowing he must be snowplowing we must be snowplowing you must be snowplowing they must be snowplowing
Perfecto
I must have snowplowed you must have snowplowed he must have snowplowed we must have snowplowed you must have snowplowed they must have snowplowed
Perfecto con V-ing
I must have been snowplowing you must have been snowplowing he must have been snowplowing we must have been snowplowing you must have been snowplowing they must have been snowplowing
Negación
Forma simple
I must not snowplow you must not snowplow he must not snowplow we must not snowplow you must not snowplow they must not snowplow
Forma con V-ing
I must not be snowplowing you must not be snowplowing he must not be snowplowing we must not be snowplowing you must not be snowplowing they must not be snowplowing
Perfecto
I must not have snowplowed you must not have snowplowed he must not have snowplowed we must not have snowplowed you must not have snowplowed they must not have snowplowed
Perfecto con V-ing
I must not have been snowplowing you must not have been snowplowing he must not have been snowplowing we must not have been snowplowing you must not have been snowplowing they must not have been snowplowing
Forma interrogativa
Forma simple
must I snowplow? must you snowplow? must he snowplow? must we snowplow? must you snowplow? must they snowplow?
Forma con V-ing
must I be snowplowing? must you be snowplowing? must he be snowplowing? must we be snowplowing? must you be snowplowing? must they be snowplowing?
Perfecto
must I have snowplowed? must you have snowplowed? must he have snowplowed? must we have snowplowed? must you have snowplowed? must they have snowplowed?
Perfecto con V-ing
must I have been snowplowing? must you have been snowplowing? must he have been snowplowing? must we have been snowplowing? must you have been snowplowing? must they have been snowplowing?
Forma interro-negativa
Forma simple
must I not snowplow? must you not snowplow? must he not snowplow? must we not snowplow? must you not snowplow? must they not snowplow?
Forma con V-ing
must I not be snowplowing? must you not be snowplowing? must he not be snowplowing? must we not be snowplowing? must you not be snowplowing? must they not be snowplowing?
Perfecto
must I not have snowplowed? must you not have snowplowed? must he not have snowplowed? must we not have snowplowed? must you not have snowplowed? must they not have snowplowed?
Perfecto con V-ing
must I not have been snowplowing? must you not have been snowplowing? must he not have been snowplowing? must we not have been snowplowing? must you not have been snowplowing? must they not have been snowplowing?