could undress
Regular verb: undress - undressed- undressed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could undress
you could undress
she could undress
we could undress
you could undress
they could undress 	I could be undressing
you could be undressing
she could be undressing
we could be undressing
you could be undressing
they could be undressing	I could have undressed
you could have undressed
she could have undressed
we could have undressed
you could have undressed
they could have undressed	I could have been undressing
you could have been undressing
she could have been undressing
we could have been undressing
you could have been undressing
they could have been undressing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't undress
you couldn't undress
she couldn't undress
we couldn't undress
you couldn't undress
they couldn't undress 	I couldn't be undressing
you couldn't be undressing
she couldn't be undressing
we couldn't be undressing
you couldn't be undressing
they couldn't be undressing	I couldn't have undressed
you couldn't have undressed
she couldn't have undressed
we couldn't have undressed
you couldn't have undressed
they couldn't have undressed	I couldn't have been undressing
you couldn't have been undressing
she couldn't have been undressing
we couldn't have been undressing
you couldn't have been undressing
they couldn't have been undressing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I undress?
could you undress?
could she undress?
could we undress?
could you undress?
could they undress? 	could I be undressing?
could you be undressing?
could she be undressing?
could we be undressing?
could you be undressing?
could they be undressing? 	could I have undressed?
could you have undressed?
could she have undressed?
could we have undressed?
could you have undressed?
could they have undressed? 	could I have been undressing?
could you have been undressing?
could she have been undressing?
could we have been undressing?
could you have been undressing?
could they have been undressing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I undress?
couldn't you undress?
couldn't she undress?
couldn't we undress?
couldn't you undress?
couldn't they undress? 	couldn't I be undressing?
couldn't you be undressing?
couldn't she be undressing?
couldn't we be undressing?
couldn't you be undressing?
couldn't they be undressing? 	couldn't I have undressed?
couldn't you have undressed?
couldn't she have undressed?
couldn't we have undressed?
couldn't you have undressed?
couldn't they have undressed? 	couldn't I have been undressing?
couldn't you have been undressing?
couldn't she have been undressing?
couldn't we have been undressing?
couldn't you have been undressing?
couldn't they have been undressing?