must harvest
Verbo regular: harvest - harvested- harvested

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must harvest
you must harvest
he must harvest
we must harvest
you must harvest
they must harvest 	I must be harvesting
you must be harvesting
he must be harvesting
we must be harvesting
you must be harvesting
they must be harvesting	I must have harvested
you must have harvested
he must have harvested
we must have harvested
you must have harvested
they must have harvested	I must have been harvesting
you must have been harvesting
he must have been harvesting
we must have been harvesting
you must have been harvesting
they must have been harvesting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not harvest
you must not harvest
he must not harvest
we must not harvest
you must not harvest
they must not harvest 	I must not be harvesting
you must not be harvesting
he must not be harvesting
we must not be harvesting
you must not be harvesting
they must not be harvesting	I must not have harvested
you must not have harvested
he must not have harvested
we must not have harvested
you must not have harvested
they must not have harvested	I must not have been harvesting
you must not have been harvesting
he must not have been harvesting
we must not have been harvesting
you must not have been harvesting
they must not have been harvesting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I harvest?
must you harvest?
must he harvest?
must we harvest?
must you harvest?
must they harvest? 	must I be harvesting?
must you be harvesting?
must he be harvesting?
must we be harvesting?
must you be harvesting?
must they be harvesting? 	must I have harvested?
must you have harvested?
must he have harvested?
must we have harvested?
must you have harvested?
must they have harvested? 	must I have been harvesting?
must you have been harvesting?
must he have been harvesting?
must we have been harvesting?
must you have been harvesting?
must they have been harvesting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not harvest?
must you not harvest?
must he not harvest?
must we not harvest?
must you not harvest?
must they not harvest? 	must I not be harvesting?
must you not be harvesting?
must he not be harvesting?
must we not be harvesting?
must you not be harvesting?
must they not be harvesting? 	must I not have harvested?
must you not have harvested?
must he not have harvested?
must we not have harvested?
must you not have harvested?
must they not have harvested? 	must I not have been harvesting?
must you not have been harvesting?
must he not have been harvesting?
must we not have been harvesting?
must you not have been harvesting?
must they not have been harvesting?