could heckle
Regular verb: heckle - heckled- heckled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could heckle
you could heckle
he could heckle
we could heckle
you could heckle
they could heckle 	I could be heckling
you could be heckling
he could be heckling
we could be heckling
you could be heckling
they could be heckling	I could have heckled
you could have heckled
he could have heckled
we could have heckled
you could have heckled
they could have heckled	I could have been heckling
you could have been heckling
he could have been heckling
we could have been heckling
you could have been heckling
they could have been heckling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't heckle
you couldn't heckle
he couldn't heckle
we couldn't heckle
you couldn't heckle
they couldn't heckle 	I couldn't be heckling
you couldn't be heckling
he couldn't be heckling
we couldn't be heckling
you couldn't be heckling
they couldn't be heckling	I couldn't have heckled
you couldn't have heckled
he couldn't have heckled
we couldn't have heckled
you couldn't have heckled
they couldn't have heckled	I couldn't have been heckling
you couldn't have been heckling
he couldn't have been heckling
we couldn't have been heckling
you couldn't have been heckling
they couldn't have been heckling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I heckle?
could you heckle?
could he heckle?
could we heckle?
could you heckle?
could they heckle? 	could I be heckling?
could you be heckling?
could he be heckling?
could we be heckling?
could you be heckling?
could they be heckling? 	could I have heckled?
could you have heckled?
could he have heckled?
could we have heckled?
could you have heckled?
could they have heckled? 	could I have been heckling?
could you have been heckling?
could he have been heckling?
could we have been heckling?
could you have been heckling?
could they have been heckling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I heckle?
couldn't you heckle?
couldn't he heckle?
couldn't we heckle?
couldn't you heckle?
couldn't they heckle? 	couldn't I be heckling?
couldn't you be heckling?
couldn't he be heckling?
couldn't we be heckling?
couldn't you be heckling?
couldn't they be heckling? 	couldn't I have heckled?
couldn't you have heckled?
couldn't he have heckled?
couldn't we have heckled?
couldn't you have heckled?
couldn't they have heckled? 	couldn't I have been heckling?
couldn't you have been heckling?
couldn't he have been heckling?
couldn't we have been heckling?
couldn't you have been heckling?
couldn't they have been heckling?