could decontaminate
Regular verb: decontaminate - decontaminated- decontaminated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could decontaminate
you could decontaminate
she could decontaminate
we could decontaminate
you could decontaminate
they could decontaminate 	I could be decontaminating
you could be decontaminating
she could be decontaminating
we could be decontaminating
you could be decontaminating
they could be decontaminating	I could have decontaminated
you could have decontaminated
she could have decontaminated
we could have decontaminated
you could have decontaminated
they could have decontaminated	I could have been decontaminating
you could have been decontaminating
she could have been decontaminating
we could have been decontaminating
you could have been decontaminating
they could have been decontaminating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not decontaminate
you could not decontaminate
she could not decontaminate
we could not decontaminate
you could not decontaminate
they could not decontaminate 	I could not be decontaminating
you could not be decontaminating
she could not be decontaminating
we could not be decontaminating
you could not be decontaminating
they could not be decontaminating	I could not have decontaminated
you could not have decontaminated
she could not have decontaminated
we could not have decontaminated
you could not have decontaminated
they could not have decontaminated	I could not have been decontaminating
you could not have been decontaminating
she could not have been decontaminating
we could not have been decontaminating
you could not have been decontaminating
they could not have been decontaminating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I decontaminate?
could you decontaminate?
could she decontaminate?
could we decontaminate?
could you decontaminate?
could they decontaminate? 	could I be decontaminating?
could you be decontaminating?
could she be decontaminating?
could we be decontaminating?
could you be decontaminating?
could they be decontaminating? 	could I have decontaminated?
could you have decontaminated?
could she have decontaminated?
could we have decontaminated?
could you have decontaminated?
could they have decontaminated? 	could I have been decontaminating?
could you have been decontaminating?
could she have been decontaminating?
could we have been decontaminating?
could you have been decontaminating?
could they have been decontaminating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not decontaminate?
could you not decontaminate?
could she not decontaminate?
could we not decontaminate?
could you not decontaminate?
could they not decontaminate? 	could I not be decontaminating?
could you not be decontaminating?
could she not be decontaminating?
could we not be decontaminating?
could you not be decontaminating?
could they not be decontaminating? 	could I not have decontaminated?
could you not have decontaminated?
could she not have decontaminated?
could we not have decontaminated?
could you not have decontaminated?
could they not have decontaminated? 	could I not have been decontaminating?
could you not have been decontaminating?
could she not have been decontaminating?
could we not have been decontaminating?
could you not have been decontaminating?
could they not have been decontaminating?