could discredit
Regular verb: discredit - discredited- discredited

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could discredit
you could discredit
she could discredit
we could discredit
you could discredit
they could discredit 	I could be discrediting
you could be discrediting
she could be discrediting
we could be discrediting
you could be discrediting
they could be discrediting	I could have discredited
you could have discredited
she 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
she 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
she 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
she 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
she 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
she 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 she discredit?
could we discredit?
could you discredit?
could they discredit? 	could I be discrediting?
could you be discrediting?
could she be discrediting?
could we be discrediting?
could you be discrediting?
could they be discrediting? 	could I have discredited?
could you have discredited?
could she 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 she 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 she 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 she 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 she 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 she have been discrediting?
couldn't we have been discrediting?
couldn't you have been discrediting?
couldn't they have been discrediting?