English verb conjugation
COULD HECKLE

Regular verb: heckle - heckled - heckled

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
I could not heckle you could not heckle he could not heckle we could not heckle you could not heckle they could not heckle	I could not be heckling you could not be heckling he could not be heckling we could not be heckling you could not be heckling they could not be heckling
Perfect	V-ing perfect
I could not have heckled you could not have heckled he could not have heckled we could not have heckled you could not have heckled they could not have heckled	I could not have been heckling you could not have been heckling he could not have been heckling we could not have been heckling you could not have been heckling they could not have been heckling

Interrogative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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
could I not heckle? could you not heckle? could he not heckle? could we not heckle? could you not heckle? could they not heckle?	could I not be heckling? could you not be heckling? could he not be heckling? could we not be heckling? could you not be heckling? could they not be heckling?
Perfect	V-ing perfect
could I not have heckled? could you not have heckled? could he not have heckled? could we not have heckled? could you not have heckled? could they not have heckled?	could I not have been heckling? could you not have been heckling? could he not have been heckling? could we not have been heckling? could you not have been heckling? could they not have been heckling?