must conserve
Verbo regular: conserve - conserved- conserved

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must conserve
you must conserve
she must conserve
we must conserve
you must conserve
they must conserve 	I must be conserving
you must be conserving
she must be conserving
we must be conserving
you must be conserving
they must be conserving	I must have conserved
you must have conserved
she must have conserved
we must have conserved
you must have conserved
they must have conserved	I must have been conserving
you must have been conserving
she must have been conserving
we must have been conserving
you must have been conserving
they must have been conserving	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not conserve
you must not conserve
she must not conserve
we must not conserve
you must not conserve
they must not conserve 	I must not be conserving
you must not be conserving
she must not be conserving
we must not be conserving
you must not be conserving
they must not be conserving	I must not have conserved
you must not have conserved
she must not have conserved
we must not have conserved
you must not have conserved
they must not have conserved	I must not have been conserving
you must not have been conserving
she must not have been conserving
we must not have been conserving
you must not have been conserving
they must not have been conserving	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I conserve?
must you conserve?
must she conserve?
must we conserve?
must you conserve?
must they conserve? 	must I be conserving?
must you be conserving?
must she be conserving?
must we be conserving?
must you be conserving?
must they be conserving? 	must I have conserved?
must you have conserved?
must she have conserved?
must we have conserved?
must you have conserved?
must they have conserved? 	must I have been conserving?
must you have been conserving?
must she have been conserving?
must we have been conserving?
must you have been conserving?
must they have been conserving? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not conserve?
must you not conserve?
must she not conserve?
must we not conserve?
must you not conserve?
must they not conserve? 	must I not be conserving?
must you not be conserving?
must she not be conserving?
must we not be conserving?
must you not be conserving?
must they not be conserving? 	must I not have conserved?
must you not have conserved?
must she not have conserved?
must we not have conserved?
must you not have conserved?
must they not have conserved? 	must I not have been conserving?
must you not have been conserving?
must she not have been conserving?
must we not have been conserving?
must you not have been conserving?
must they not have been conserving?