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 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
Perfect	V-ing perfect
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
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
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?
Perfect	V-ing perfect
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?