could neutralize
Regular verb: neutralize - neutralized- neutralized

Affirmation 	
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I could neutralize
you could neutralize
she could neutralize
we could neutralize
you could neutralize
they could neutralize 	I could be neutralizing
you could be neutralizing
she could be neutralizing
we could be neutralizing
you could be neutralizing
they could be neutralizing	I could have neutralized
you could have neutralized
she could have neutralized
we could have neutralized
you could have neutralized
they could have neutralized	I could have been neutralizing
you could have been neutralizing
she could have been neutralizing
we could have been neutralizing
you could have been neutralizing
they could have been neutralizing	

Negation 	
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I couldn't neutralize
you couldn't neutralize
she couldn't neutralize
we couldn't neutralize
you couldn't neutralize
they couldn't neutralize 	I couldn't be neutralizing
you couldn't be neutralizing
she couldn't be neutralizing
we couldn't be neutralizing
you couldn't be neutralizing
they couldn't be neutralizing	I couldn't have neutralized
you couldn't have neutralized
she couldn't have neutralized
we couldn't have neutralized
you couldn't have neutralized
they couldn't have neutralized	I couldn't have been neutralizing
you couldn't have been neutralizing
she couldn't have been neutralizing
we couldn't have been neutralizing
you couldn't have been neutralizing
they couldn't have been neutralizing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I neutralize?
could you neutralize?
could she neutralize?
could we neutralize?
could you neutralize?
could they neutralize? 	could I be neutralizing?
could you be neutralizing?
could she be neutralizing?
could we be neutralizing?
could you be neutralizing?
could they be neutralizing? 	could I have neutralized?
could you have neutralized?
could she have neutralized?
could we have neutralized?
could you have neutralized?
could they have neutralized? 	could I have been neutralizing?
could you have been neutralizing?
could she have been neutralizing?
could we have been neutralizing?
could you have been neutralizing?
could they have been neutralizing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I neutralize?
couldn't you neutralize?
couldn't she neutralize?
couldn't we neutralize?
couldn't you neutralize?
couldn't they neutralize? 	couldn't I be neutralizing?
couldn't you be neutralizing?
couldn't she be neutralizing?
couldn't we be neutralizing?
couldn't you be neutralizing?
couldn't they be neutralizing? 	couldn't I have neutralized?
couldn't you have neutralized?
couldn't she have neutralized?
couldn't we have neutralized?
couldn't you have neutralized?
couldn't they have neutralized? 	couldn't I have been neutralizing?
couldn't you have been neutralizing?
couldn't she have been neutralizing?
couldn't we have been neutralizing?
couldn't you have been neutralizing?
couldn't they have been neutralizing?