could disc
Regular verb: disc - disced- disced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could disc
you could disc
she could disc
we could disc
you could disc
they could disc 	I could be discing
you could be discing
she could be discing
we could be discing
you could be discing
they could be discing	I could have disced
you could have disced
she could have disced
we could have disced
you could have disced
they could have disced	I could have been discing
you could have been discing
she could have been discing
we could have been discing
you could have been discing
they could have been discing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't disc
you couldn't disc
she couldn't disc
we couldn't disc
you couldn't disc
they couldn't disc 	I couldn't be discing
you couldn't be discing
she couldn't be discing
we couldn't be discing
you couldn't be discing
they couldn't be discing	I couldn't have disced
you couldn't have disced
she couldn't have disced
we couldn't have disced
you couldn't have disced
they couldn't have disced	I couldn't have been discing
you couldn't have been discing
she couldn't have been discing
we couldn't have been discing
you couldn't have been discing
they couldn't have been discing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I disc?
could you disc?
could she disc?
could we disc?
could you disc?
could they disc? 	could I be discing?
could you be discing?
could she be discing?
could we be discing?
could you be discing?
could they be discing? 	could I have disced?
could you have disced?
could she have disced?
could we have disced?
could you have disced?
could they have disced? 	could I have been discing?
could you have been discing?
could she have been discing?
could we have been discing?
could you have been discing?
could they have been discing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I disc?
couldn't you disc?
couldn't she disc?
couldn't we disc?
couldn't you disc?
couldn't they disc? 	couldn't I be discing?
couldn't you be discing?
couldn't she be discing?
couldn't we be discing?
couldn't you be discing?
couldn't they be discing? 	couldn't I have disced?
couldn't you have disced?
couldn't she have disced?
couldn't we have disced?
couldn't you have disced?
couldn't they have disced? 	couldn't I have been discing?
couldn't you have been discing?
couldn't she have been discing?
couldn't we have been discing?
couldn't you have been discing?
couldn't they have been discing?