could shill
Regular verb: shill - shilled- shilled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could shill
you could shill
she could shill
we could shill
you could shill
they could shill 	I could be shilling
you could be shilling
she could be shilling
we could be shilling
you could be shilling
they could be shilling	I could have shilled
you could have shilled
she could have shilled
we could have shilled
you could have shilled
they could have shilled	I could have been shilling
you could have been shilling
she could have been shilling
we could have been shilling
you could have been shilling
they could have been shilling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't shill
you couldn't shill
she couldn't shill
we couldn't shill
you couldn't shill
they couldn't shill 	I couldn't be shilling
you couldn't be shilling
she couldn't be shilling
we couldn't be shilling
you couldn't be shilling
they couldn't be shilling	I couldn't have shilled
you couldn't have shilled
she couldn't have shilled
we couldn't have shilled
you couldn't have shilled
they couldn't have shilled	I couldn't have been shilling
you couldn't have been shilling
she couldn't have been shilling
we couldn't have been shilling
you couldn't have been shilling
they couldn't have been shilling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I shill?
could you shill?
could she shill?
could we shill?
could you shill?
could they shill? 	could I be shilling?
could you be shilling?
could she be shilling?
could we be shilling?
could you be shilling?
could they be shilling? 	could I have shilled?
could you have shilled?
could she have shilled?
could we have shilled?
could you have shilled?
could they have shilled? 	could I have been shilling?
could you have been shilling?
could she have been shilling?
could we have been shilling?
could you have been shilling?
could they have been shilling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I shill?
couldn't you shill?
couldn't she shill?
couldn't we shill?
couldn't you shill?
couldn't they shill? 	couldn't I be shilling?
couldn't you be shilling?
couldn't she be shilling?
couldn't we be shilling?
couldn't you be shilling?
couldn't they be shilling? 	couldn't I have shilled?
couldn't you have shilled?
couldn't she have shilled?
couldn't we have shilled?
couldn't you have shilled?
couldn't they have shilled? 	couldn't I have been shilling?
couldn't you have been shilling?
couldn't she have been shilling?
couldn't we have been shilling?
couldn't you have been shilling?
couldn't they have been shilling?