could winterize winterize
Regular verb: winterize winterize - winterize winterized- winterize winterized

, this verb may not exist. Conjugation is given as example.

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could winterize winterize
you could winterize winterize
she could winterize winterize
we could winterize winterize
you could winterize winterize
they could winterize winterize 	I could be winterize winterizing
you could be winterize winterizing
she could be winterize winterizing
we could be winterize winterizing
you could be winterize winterizing
they could be winterize winterizing	I could have winterize winterized
you could have winterize winterized
she could have winterize winterized
we could have winterize winterized
you could have winterize winterized
they could have winterize winterized	I could have been winterize winterizing
you could have been winterize winterizing
she could have been winterize winterizing
we could have been winterize winterizing
you could have been winterize winterizing
they could have been winterize winterizing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't winterize winterize
you couldn't winterize winterize
she couldn't winterize winterize
we couldn't winterize winterize
you couldn't winterize winterize
they couldn't winterize winterize 	I couldn't be winterize winterizing
you couldn't be winterize winterizing
she couldn't be winterize winterizing
we couldn't be winterize winterizing
you couldn't be winterize winterizing
they couldn't be winterize winterizing	I couldn't have winterize winterized
you couldn't have winterize winterized
she couldn't have winterize winterized
we couldn't have winterize winterized
you couldn't have winterize winterized
they couldn't have winterize winterized	I couldn't have been winterize winterizing
you couldn't have been winterize winterizing
she couldn't have been winterize winterizing
we couldn't have been winterize winterizing
you couldn't have been winterize winterizing
they couldn't have been winterize winterizing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I winterize winterize?
could you winterize winterize?
could she winterize winterize?
could we winterize winterize?
could you winterize winterize?
could they winterize winterize? 	could I be winterize winterizing?
could you be winterize winterizing?
could she be winterize winterizing?
could we be winterize winterizing?
could you be winterize winterizing?
could they be winterize winterizing? 	could I have winterize winterized?
could you have winterize winterized?
could she have winterize winterized?
could we have winterize winterized?
could you have winterize winterized?
could they have winterize winterized? 	could I have been winterize winterizing?
could you have been winterize winterizing?
could she have been winterize winterizing?
could we have been winterize winterizing?
could you have been winterize winterizing?
could they have been winterize winterizing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I winterize winterize?
couldn't you winterize winterize?
couldn't she winterize winterize?
couldn't we winterize winterize?
couldn't you winterize winterize?
couldn't they winterize winterize? 	couldn't I be winterize winterizing?
couldn't you be winterize winterizing?
couldn't she be winterize winterizing?
couldn't we be winterize winterizing?
couldn't you be winterize winterizing?
couldn't they be winterize winterizing? 	couldn't I have winterize winterized?
couldn't you have winterize winterized?
couldn't she have winterize winterized?
couldn't we have winterize winterized?
couldn't you have winterize winterized?
couldn't they have winterize winterized? 	couldn't I have been winterize winterizing?
couldn't you have been winterize winterizing?
couldn't she have been winterize winterizing?
couldn't we have been winterize winterizing?
couldn't you have been winterize winterizing?
couldn't they have been winterize winterizing?