could contort
Regular verb: contort - contorted- contorted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could contort
you could contort
he could contort
we could contort
you could contort
they could contort 	I could be contorting
you could be contorting
he could be contorting
we could be contorting
you could be contorting
they could be contorting	I could have contorted
you could have contorted
he could have contorted
we could have contorted
you could have contorted
they could have contorted	I could have been contorting
you could have been contorting
he could have been contorting
we could have been contorting
you could have been contorting
they could have been contorting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't contort
you couldn't contort
he couldn't contort
we couldn't contort
you couldn't contort
they couldn't contort 	I couldn't be contorting
you couldn't be contorting
he couldn't be contorting
we couldn't be contorting
you couldn't be contorting
they couldn't be contorting	I couldn't have contorted
you couldn't have contorted
he couldn't have contorted
we couldn't have contorted
you couldn't have contorted
they couldn't have contorted	I couldn't have been contorting
you couldn't have been contorting
he couldn't have been contorting
we couldn't have been contorting
you couldn't have been contorting
they couldn't have been contorting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I contort?
could you contort?
could he contort?
could we contort?
could you contort?
could they contort? 	could I be contorting?
could you be contorting?
could he be contorting?
could we be contorting?
could you be contorting?
could they be contorting? 	could I have contorted?
could you have contorted?
could he have contorted?
could we have contorted?
could you have contorted?
could they have contorted? 	could I have been contorting?
could you have been contorting?
could he have been contorting?
could we have been contorting?
could you have been contorting?
could they have been contorting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I contort?
couldn't you contort?
couldn't he contort?
couldn't we contort?
couldn't you contort?
couldn't they contort? 	couldn't I be contorting?
couldn't you be contorting?
couldn't he be contorting?
couldn't we be contorting?
couldn't you be contorting?
couldn't they be contorting? 	couldn't I have contorted?
couldn't you have contorted?
couldn't he have contorted?
couldn't we have contorted?
couldn't you have contorted?
couldn't they have contorted? 	couldn't I have been contorting?
couldn't you have been contorting?
couldn't he have been contorting?
couldn't we have been contorting?
couldn't you have been contorting?
couldn't they have been contorting?