could clip
Regular verb: clip - clipped- clipped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could clip
you could clip
he could clip
we could clip
you could clip
they could clip 	I could be clipping
you could be clipping
he could be clipping
we could be clipping
you could be clipping
they could be clipping	I could have clipped
you could have clipped
he could have clipped
we could have clipped
you could have clipped
they could have clipped	I could have been clipping
you could have been clipping
he could have been clipping
we could have been clipping
you could have been clipping
they could have been clipping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't clip
you couldn't clip
he couldn't clip
we couldn't clip
you couldn't clip
they couldn't clip 	I couldn't be clipping
you couldn't be clipping
he couldn't be clipping
we couldn't be clipping
you couldn't be clipping
they couldn't be clipping	I couldn't have clipped
you couldn't have clipped
he couldn't have clipped
we couldn't have clipped
you couldn't have clipped
they couldn't have clipped	I couldn't have been clipping
you couldn't have been clipping
he couldn't have been clipping
we couldn't have been clipping
you couldn't have been clipping
they couldn't have been clipping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I clip?
could you clip?
could he clip?
could we clip?
could you clip?
could they clip? 	could I be clipping?
could you be clipping?
could he be clipping?
could we be clipping?
could you be clipping?
could they be clipping? 	could I have clipped?
could you have clipped?
could he have clipped?
could we have clipped?
could you have clipped?
could they have clipped? 	could I have been clipping?
could you have been clipping?
could he have been clipping?
could we have been clipping?
could you have been clipping?
could they have been clipping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I clip?
couldn't you clip?
couldn't he clip?
couldn't we clip?
couldn't you clip?
couldn't they clip? 	couldn't I be clipping?
couldn't you be clipping?
couldn't he be clipping?
couldn't we be clipping?
couldn't you be clipping?
couldn't they be clipping? 	couldn't I have clipped?
couldn't you have clipped?
couldn't he have clipped?
couldn't we have clipped?
couldn't you have clipped?
couldn't they have clipped? 	couldn't I have been clipping?
couldn't you have been clipping?
couldn't he have been clipping?
couldn't we have been clipping?
couldn't you have been clipping?
couldn't they have been clipping?