could drab
Regular verb: drab - drabed- drabed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could drab
you could drab
she could drab
we could drab
you could drab
they could drab 	I could be drabing
you could be drabing
she could be drabing
we could be drabing
you could be drabing
they could be drabing	I could have drabed
you could have drabed
she could have drabed
we could have drabed
you could have drabed
they could have drabed	I could have been drabing
you could have been drabing
she could have been drabing
we could have been drabing
you could have been drabing
they could have been drabing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't drab
you couldn't drab
she couldn't drab
we couldn't drab
you couldn't drab
they couldn't drab 	I couldn't be drabing
you couldn't be drabing
she couldn't be drabing
we couldn't be drabing
you couldn't be drabing
they couldn't be drabing	I couldn't have drabed
you couldn't have drabed
she couldn't have drabed
we couldn't have drabed
you couldn't have drabed
they couldn't have drabed	I couldn't have been drabing
you couldn't have been drabing
she couldn't have been drabing
we couldn't have been drabing
you couldn't have been drabing
they couldn't have been drabing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I drab?
could you drab?
could she drab?
could we drab?
could you drab?
could they drab? 	could I be drabing?
could you be drabing?
could she be drabing?
could we be drabing?
could you be drabing?
could they be drabing? 	could I have drabed?
could you have drabed?
could she have drabed?
could we have drabed?
could you have drabed?
could they have drabed? 	could I have been drabing?
could you have been drabing?
could she have been drabing?
could we have been drabing?
could you have been drabing?
could they have been drabing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I drab?
couldn't you drab?
couldn't she drab?
couldn't we drab?
couldn't you drab?
couldn't they drab? 	couldn't I be drabing?
couldn't you be drabing?
couldn't she be drabing?
couldn't we be drabing?
couldn't you be drabing?
couldn't they be drabing? 	couldn't I have drabed?
couldn't you have drabed?
couldn't she have drabed?
couldn't we have drabed?
couldn't you have drabed?
couldn't they have drabed? 	couldn't I have been drabing?
couldn't you have been drabing?
couldn't she have been drabing?
couldn't we have been drabing?
couldn't you have been drabing?
couldn't they have been drabing?