could sandbag
Regular verb: sandbag - sandbagged- sandbagged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could sandbag
you could sandbag
he could sandbag
we could sandbag
you could sandbag
they could sandbag 	I could be sandbagging
you could be sandbagging
he could be sandbagging
we could be sandbagging
you could be sandbagging
they could be sandbagging	I could have sandbagged
you could have sandbagged
he could have sandbagged
we could have sandbagged
you could have sandbagged
they could have sandbagged	I could have been sandbagging
you could have been sandbagging
he could have been sandbagging
we could have been sandbagging
you could have been sandbagging
they could have been sandbagging	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't sandbag
you couldn't sandbag
he couldn't sandbag
we couldn't sandbag
you couldn't sandbag
they couldn't sandbag 	I couldn't be sandbagging
you couldn't be sandbagging
he couldn't be sandbagging
we couldn't be sandbagging
you couldn't be sandbagging
they couldn't be sandbagging	I couldn't have sandbagged
you couldn't have sandbagged
he couldn't have sandbagged
we couldn't have sandbagged
you couldn't have sandbagged
they couldn't have sandbagged	I couldn't have been sandbagging
you couldn't have been sandbagging
he couldn't have been sandbagging
we couldn't have been sandbagging
you couldn't have been sandbagging
they couldn't have been sandbagging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I sandbag?
could you sandbag?
could he sandbag?
could we sandbag?
could you sandbag?
could they sandbag? 	could I be sandbagging?
could you be sandbagging?
could he be sandbagging?
could we be sandbagging?
could you be sandbagging?
could they be sandbagging? 	could I have sandbagged?
could you have sandbagged?
could he have sandbagged?
could we have sandbagged?
could you have sandbagged?
could they have sandbagged? 	could I have been sandbagging?
could you have been sandbagging?
could he have been sandbagging?
could we have been sandbagging?
could you have been sandbagging?
could they have been sandbagging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I sandbag?
couldn't you sandbag?
couldn't he sandbag?
couldn't we sandbag?
couldn't you sandbag?
couldn't they sandbag? 	couldn't I be sandbagging?
couldn't you be sandbagging?
couldn't he be sandbagging?
couldn't we be sandbagging?
couldn't you be sandbagging?
couldn't they be sandbagging? 	couldn't I have sandbagged?
couldn't you have sandbagged?
couldn't he have sandbagged?
couldn't we have sandbagged?
couldn't you have sandbagged?
couldn't they have sandbagged? 	couldn't I have been sandbagging?
couldn't you have been sandbagging?
couldn't he have been sandbagging?
couldn't we have been sandbagging?
couldn't you have been sandbagging?
couldn't they have been sandbagging?