could credit
Regular verb: credit - credited- credited

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could credit
you could credit
he could credit
we could credit
you could credit
they could credit 	I could be crediting
you could be crediting
he could be crediting
we could be crediting
you could be crediting
they could be crediting	I could have credited
you could have credited
he could have credited
we could have credited
you could have credited
they could have credited	I could have been crediting
you could have been crediting
he could have been crediting
we could have been crediting
you could have been crediting
they could have been crediting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't credit
you couldn't credit
he couldn't credit
we couldn't credit
you couldn't credit
they couldn't credit 	I couldn't be crediting
you couldn't be crediting
he couldn't be crediting
we couldn't be crediting
you couldn't be crediting
they couldn't be crediting	I couldn't have credited
you couldn't have credited
he couldn't have credited
we couldn't have credited
you couldn't have credited
they couldn't have credited	I couldn't have been crediting
you couldn't have been crediting
he couldn't have been crediting
we couldn't have been crediting
you couldn't have been crediting
they couldn't have been crediting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I credit?
could you credit?
could he credit?
could we credit?
could you credit?
could they credit? 	could I be crediting?
could you be crediting?
could he be crediting?
could we be crediting?
could you be crediting?
could they be crediting? 	could I have credited?
could you have credited?
could he have credited?
could we have credited?
could you have credited?
could they have credited? 	could I have been crediting?
could you have been crediting?
could he have been crediting?
could we have been crediting?
could you have been crediting?
could they have been crediting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I credit?
couldn't you credit?
couldn't he credit?
couldn't we credit?
couldn't you credit?
couldn't they credit? 	couldn't I be crediting?
couldn't you be crediting?
couldn't he be crediting?
couldn't we be crediting?
couldn't you be crediting?
couldn't they be crediting? 	couldn't I have credited?
couldn't you have credited?
couldn't he have credited?
couldn't we have credited?
couldn't you have credited?
couldn't they have credited? 	couldn't I have been crediting?
couldn't you have been crediting?
couldn't he have been crediting?
couldn't we have been crediting?
couldn't you have been crediting?
couldn't they have been crediting?