could deskill
Regular verb: deskill - deskilled- deskilled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could deskill
you could deskill
she could deskill
we could deskill
you could deskill
they could deskill 	I could be deskilling
you could be deskilling
she could be deskilling
we could be deskilling
you could be deskilling
they could be deskilling	I could have deskilled
you could have deskilled
she could have deskilled
we could have deskilled
you could have deskilled
they could have deskilled	I could have been deskilling
you could have been deskilling
she could have been deskilling
we could have been deskilling
you could have been deskilling
they could have been deskilling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't deskill
you couldn't deskill
she couldn't deskill
we couldn't deskill
you couldn't deskill
they couldn't deskill 	I couldn't be deskilling
you couldn't be deskilling
she couldn't be deskilling
we couldn't be deskilling
you couldn't be deskilling
they couldn't be deskilling	I couldn't have deskilled
you couldn't have deskilled
she couldn't have deskilled
we couldn't have deskilled
you couldn't have deskilled
they couldn't have deskilled	I couldn't have been deskilling
you couldn't have been deskilling
she couldn't have been deskilling
we couldn't have been deskilling
you couldn't have been deskilling
they couldn't have been deskilling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I deskill?
could you deskill?
could she deskill?
could we deskill?
could you deskill?
could they deskill? 	could I be deskilling?
could you be deskilling?
could she be deskilling?
could we be deskilling?
could you be deskilling?
could they be deskilling? 	could I have deskilled?
could you have deskilled?
could she have deskilled?
could we have deskilled?
could you have deskilled?
could they have deskilled? 	could I have been deskilling?
could you have been deskilling?
could she have been deskilling?
could we have been deskilling?
could you have been deskilling?
could they have been deskilling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I deskill?
couldn't you deskill?
couldn't she deskill?
couldn't we deskill?
couldn't you deskill?
couldn't they deskill? 	couldn't I be deskilling?
couldn't you be deskilling?
couldn't she be deskilling?
couldn't we be deskilling?
couldn't you be deskilling?
couldn't they be deskilling? 	couldn't I have deskilled?
couldn't you have deskilled?
couldn't she have deskilled?
couldn't we have deskilled?
couldn't you have deskilled?
couldn't they have deskilled? 	couldn't I have been deskilling?
couldn't you have been deskilling?
couldn't she have been deskilling?
couldn't we have been deskilling?
couldn't you have been deskilling?
couldn't they have been deskilling?