could discredit
Regular verb: discredit - discredited- discredited

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could discredit
you could discredit
he could discredit
we could discredit
you could discredit
they could discredit 	I could be discrediting
you could be discrediting
he could be discrediting
we could be discrediting
you could be discrediting
they could be discrediting	I could have discredited
you could have discredited
he could have discredited
we could have discredited
you could have discredited
they could have discredited	I could have been discrediting
you could have been discrediting
he could have been discrediting
we could have been discrediting
you could have been discrediting
they could have been discrediting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't discredit
you couldn't discredit
he couldn't discredit
we couldn't discredit
you couldn't discredit
they couldn't discredit 	I couldn't be discrediting
you couldn't be discrediting
he couldn't be discrediting
we couldn't be discrediting
you couldn't be discrediting
they couldn't be discrediting	I couldn't have discredited
you couldn't have discredited
he couldn't have discredited
we couldn't have discredited
you couldn't have discredited
they couldn't have discredited	I couldn't have been discrediting
you couldn't have been discrediting
he couldn't have been discrediting
we couldn't have been discrediting
you couldn't have been discrediting
they couldn't have been discrediting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I discredit?
could you discredit?
could he discredit?
could we discredit?
could you discredit?
could they discredit? 	could I be discrediting?
could you be discrediting?
could he be discrediting?
could we be discrediting?
could you be discrediting?
could they be discrediting? 	could I have discredited?
could you have discredited?
could he have discredited?
could we have discredited?
could you have discredited?
could they have discredited? 	could I have been discrediting?
could you have been discrediting?
could he have been discrediting?
could we have been discrediting?
could you have been discrediting?
could they have been discrediting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I discredit?
couldn't you discredit?
couldn't he discredit?
couldn't we discredit?
couldn't you discredit?
couldn't they discredit? 	couldn't I be discrediting?
couldn't you be discrediting?
couldn't he be discrediting?
couldn't we be discrediting?
couldn't you be discrediting?
couldn't they be discrediting? 	couldn't I have discredited?
couldn't you have discredited?
couldn't he have discredited?
couldn't we have discredited?
couldn't you have discredited?
couldn't they have discredited? 	couldn't I have been discrediting?
couldn't you have been discrediting?
couldn't he have been discrediting?
couldn't we have been discrediting?
couldn't you have been discrediting?
couldn't they have been discrediting?