must snowplow
Verbo regular: snowplow - snowplowed- snowplowed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must snowplow
you must snowplow
he must snowplow
we must snowplow
you must snowplow
they must snowplow 	I must be snowplowing
you must be snowplowing
he must be snowplowing
we must be snowplowing
you must be snowplowing
they must be snowplowing	I must have snowplowed
you must have snowplowed
he must have snowplowed
we must have snowplowed
you must have snowplowed
they must have snowplowed	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 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not snowplow
you must not snowplow
he must not snowplow
we must not snowplow
you must not snowplow
they must not snowplow 	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	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	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 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I snowplow?
must you snowplow?
must he snowplow?
must we snowplow?
must you snowplow?
must they snowplow? 	must I be snowplowing?
must you be snowplowing?
must he be snowplowing?
must we be snowplowing?
must you be snowplowing?
must they be snowplowing? 	must I have snowplowed?
must you have snowplowed?
must he have snowplowed?
must we have snowplowed?
must you have snowplowed?
must they have snowplowed? 	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 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not snowplow?
must you not snowplow?
must he not snowplow?
must we not snowplow?
must you not snowplow?
must they not snowplow? 	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? 	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? 	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?