could rag
Regular verb: rag - ragged- ragged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could rag
you could rag
she could rag
we could rag
you could rag
they could rag 	I could be ragging
you could be ragging
she could be ragging
we could be ragging
you could be ragging
they could be ragging	I could have ragged
you could have ragged
she could have ragged
we could have ragged
you could have ragged
they could have ragged	I could have been ragging
you could have been ragging
she could have been ragging
we could have been ragging
you could have been ragging
they could have been ragging	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't rag
you couldn't rag
she couldn't rag
we couldn't rag
you couldn't rag
they couldn't rag 	I couldn't be ragging
you couldn't be ragging
she couldn't be ragging
we couldn't be ragging
you couldn't be ragging
they couldn't be ragging	I couldn't have ragged
you couldn't have ragged
she couldn't have ragged
we couldn't have ragged
you couldn't have ragged
they couldn't have ragged	I couldn't have been ragging
you couldn't have been ragging
she couldn't have been ragging
we couldn't have been ragging
you couldn't have been ragging
they couldn't have been ragging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I rag?
could you rag?
could she rag?
could we rag?
could you rag?
could they rag? 	could I be ragging?
could you be ragging?
could she be ragging?
could we be ragging?
could you be ragging?
could they be ragging? 	could I have ragged?
could you have ragged?
could she have ragged?
could we have ragged?
could you have ragged?
could they have ragged? 	could I have been ragging?
could you have been ragging?
could she have been ragging?
could we have been ragging?
could you have been ragging?
could they have been ragging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I rag?
couldn't you rag?
couldn't she rag?
couldn't we rag?
couldn't you rag?
couldn't they rag? 	couldn't I be ragging?
couldn't you be ragging?
couldn't she be ragging?
couldn't we be ragging?
couldn't you be ragging?
couldn't they be ragging? 	couldn't I have ragged?
couldn't you have ragged?
couldn't she have ragged?
couldn't we have ragged?
couldn't you have ragged?
couldn't they have ragged? 	couldn't I have been ragging?
couldn't you have been ragging?
couldn't she have been ragging?
couldn't we have been ragging?
couldn't you have been ragging?
couldn't they have been ragging?