English verb conjugation
COULD UNDOCK

Regular verb: undock - undocked - undocked

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?