could undock
Regular verb: undock - undocked- undocked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could undock
you could undock
she could undock
we could undock
you could undock
they could undock 	I could be undocking
you could be undocking
she could be undocking
we could be undocking
you could be undocking
they could be undocking	I could have undocked
you could have undocked
she could have undocked
we could have undocked
you could have undocked
they could have undocked	I could have been undocking
you could have been undocking
she could have been undocking
we could have been undocking
you could have been undocking
they could have been undocking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't undock
you couldn't undock
she couldn't undock
we couldn't undock
you couldn't undock
they couldn't undock 	I couldn't be undocking
you couldn't be undocking
she couldn't be undocking
we couldn't be undocking
you couldn't be undocking
they couldn't be undocking	I couldn't have undocked
you couldn't have undocked
she couldn't have undocked
we couldn't have undocked
you couldn't have undocked
they couldn't have undocked	I couldn't have been undocking
you couldn't have been undocking
she couldn't have been undocking
we couldn't have been undocking
you couldn't have been undocking
they couldn't have been undocking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I undock?
could you undock?
could she undock?
could we undock?
could you undock?
could they undock? 	could I be undocking?
could you be undocking?
could she be undocking?
could we be undocking?
could you be undocking?
could they be undocking? 	could I have undocked?
could you have undocked?
could she have undocked?
could we have undocked?
could you have undocked?
could they have undocked? 	could I have been undocking?
could you have been undocking?
could she have been undocking?
could we have been undocking?
could you have been undocking?
could they have been undocking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I undock?
couldn't you undock?
couldn't she undock?
couldn't we undock?
couldn't you undock?
couldn't they undock? 	couldn't I be undocking?
couldn't you be undocking?
couldn't she be undocking?
couldn't we be undocking?
couldn't you be undocking?
couldn't they be undocking? 	couldn't I have undocked?
couldn't you have undocked?
couldn't she have undocked?
couldn't we have undocked?
couldn't you have undocked?
couldn't they have undocked? 	couldn't I have been undocking?
couldn't you have been undocking?
couldn't she have been undocking?
couldn't we have been undocking?
couldn't you have been undocking?
couldn't they have been undocking?