could stag
Regular verb: stag - staged- staged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could stag
you could stag
he could stag
we could stag
you could stag
they could stag 	I could be staging
you could be staging
he could be staging
we could be staging
you could be staging
they could be staging	I could have staged
you could have staged
he could have staged
we could have staged
you could have staged
they could have staged	I could have been staging
you could have been staging
he could have been staging
we could have been staging
you could have been staging
they could have been staging	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not stag
you could not stag
he could not stag
we could not stag
you could not stag
they could not stag 	I could not be staging
you could not be staging
he could not be staging
we could not be staging
you could not be staging
they could not be staging	I could not have staged
you could not have staged
he could not have staged
we could not have staged
you could not have staged
they could not have staged	I could not have been staging
you could not have been staging
he could not have been staging
we could not have been staging
you could not have been staging
they could not have been staging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I stag?
could you stag?
could he stag?
could we stag?
could you stag?
could they stag? 	could I be staging?
could you be staging?
could he be staging?
could we be staging?
could you be staging?
could they be staging? 	could I have staged?
could you have staged?
could he have staged?
could we have staged?
could you have staged?
could they have staged? 	could I have been staging?
could you have been staging?
could he have been staging?
could we have been staging?
could you have been staging?
could they have been staging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not stag?
could you not stag?
could he not stag?
could we not stag?
could you not stag?
could they not stag? 	could I not be staging?
could you not be staging?
could he not be staging?
could we not be staging?
could you not be staging?
could they not be staging? 	could I not have staged?
could you not have staged?
could he not have staged?
could we not have staged?
could you not have staged?
could they not have staged? 	could I not have been staging?
could you not have been staging?
could he not have been staging?
could we not have been staging?
could you not have been staging?
could they not have been staging?