could sprig
Regular verb: sprig - sprigged- sprigged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could sprig
you could sprig
she could sprig
we could sprig
you could sprig
they could sprig 	I could be sprigging
you could be sprigging
she could be sprigging
we could be sprigging
you could be sprigging
they could be sprigging	I could have sprigged
you could have sprigged
she could have sprigged
we could have sprigged
you could have sprigged
they could have sprigged	I could have been sprigging
you could have been sprigging
she could have been sprigging
we could have been sprigging
you could have been sprigging
they could have been sprigging	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't sprig
you couldn't sprig
she couldn't sprig
we couldn't sprig
you couldn't sprig
they couldn't sprig 	I couldn't be sprigging
you couldn't be sprigging
she couldn't be sprigging
we couldn't be sprigging
you couldn't be sprigging
they couldn't be sprigging	I couldn't have sprigged
you couldn't have sprigged
she couldn't have sprigged
we couldn't have sprigged
you couldn't have sprigged
they couldn't have sprigged	I couldn't have been sprigging
you couldn't have been sprigging
she couldn't have been sprigging
we couldn't have been sprigging
you couldn't have been sprigging
they couldn't have been sprigging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I sprig?
could you sprig?
could she sprig?
could we sprig?
could you sprig?
could they sprig? 	could I be sprigging?
could you be sprigging?
could she be sprigging?
could we be sprigging?
could you be sprigging?
could they be sprigging? 	could I have sprigged?
could you have sprigged?
could she have sprigged?
could we have sprigged?
could you have sprigged?
could they have sprigged? 	could I have been sprigging?
could you have been sprigging?
could she have been sprigging?
could we have been sprigging?
could you have been sprigging?
could they have been sprigging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I sprig?
couldn't you sprig?
couldn't she sprig?
couldn't we sprig?
couldn't you sprig?
couldn't they sprig? 	couldn't I be sprigging?
couldn't you be sprigging?
couldn't she be sprigging?
couldn't we be sprigging?
couldn't you be sprigging?
couldn't they be sprigging? 	couldn't I have sprigged?
couldn't you have sprigged?
couldn't she have sprigged?
couldn't we have sprigged?
couldn't you have sprigged?
couldn't they have sprigged? 	couldn't I have been sprigging?
couldn't you have been sprigging?
couldn't she have been sprigging?
couldn't we have been sprigging?
couldn't you have been sprigging?
couldn't they have been sprigging?