could wriggle
Regular verb: wriggle - wriggled- wriggled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could wriggle
you could wriggle
he could wriggle
we could wriggle
you could wriggle
they could wriggle 	I could be wriggling
you could be wriggling
he could be wriggling
we could be wriggling
you could be wriggling
they could be wriggling	I could have wriggled
you could have wriggled
he could have wriggled
we could have wriggled
you could have wriggled
they could have wriggled	I could have been wriggling
you could have been wriggling
he could have been wriggling
we could have been wriggling
you could have been wriggling
they could have been wriggling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't wriggle
you couldn't wriggle
he couldn't wriggle
we couldn't wriggle
you couldn't wriggle
they couldn't wriggle 	I couldn't be wriggling
you couldn't be wriggling
he couldn't be wriggling
we couldn't be wriggling
you couldn't be wriggling
they couldn't be wriggling	I couldn't have wriggled
you couldn't have wriggled
he couldn't have wriggled
we couldn't have wriggled
you couldn't have wriggled
they couldn't have wriggled	I couldn't have been wriggling
you couldn't have been wriggling
he couldn't have been wriggling
we couldn't have been wriggling
you couldn't have been wriggling
they couldn't have been wriggling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I wriggle?
could you wriggle?
could he wriggle?
could we wriggle?
could you wriggle?
could they wriggle? 	could I be wriggling?
could you be wriggling?
could he be wriggling?
could we be wriggling?
could you be wriggling?
could they be wriggling? 	could I have wriggled?
could you have wriggled?
could he have wriggled?
could we have wriggled?
could you have wriggled?
could they have wriggled? 	could I have been wriggling?
could you have been wriggling?
could he have been wriggling?
could we have been wriggling?
could you have been wriggling?
could they have been wriggling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I wriggle?
couldn't you wriggle?
couldn't he wriggle?
couldn't we wriggle?
couldn't you wriggle?
couldn't they wriggle? 	couldn't I be wriggling?
couldn't you be wriggling?
couldn't he be wriggling?
couldn't we be wriggling?
couldn't you be wriggling?
couldn't they be wriggling? 	couldn't I have wriggled?
couldn't you have wriggled?
couldn't he have wriggled?
couldn't we have wriggled?
couldn't you have wriggled?
couldn't they have wriggled? 	couldn't I have been wriggling?
couldn't you have been wriggling?
couldn't he have been wriggling?
couldn't we have been wriggling?
couldn't you have been wriggling?
couldn't they have been wriggling?