English verb conjugation
COULD UNCLOG

Regular verb: unclog - unclogged - unclogged

Affirmation

Simple form	V-ing form
I could unclog you could unclog he could unclog we could unclog you could unclog they could unclog	I could be unclogging you could be unclogging he could be unclogging we could be unclogging you could be unclogging they could be unclogging
Perfect	V-ing perfect
I could have unclogged you could have unclogged he could have unclogged we could have unclogged you could have unclogged they could have unclogged	I could have been unclogging you could have been unclogging he could have been unclogging we could have been unclogging you could have been unclogging they could have been unclogging

Negation

Simple form	V-ing form
I couldn't unclog you couldn't unclog he couldn't unclog we couldn't unclog you couldn't unclog they couldn't unclog	I couldn't be unclogging you couldn't be unclogging he couldn't be unclogging we couldn't be unclogging you couldn't be unclogging they couldn't be unclogging
Perfect	V-ing perfect
I couldn't have unclogged you couldn't have unclogged he couldn't have unclogged we couldn't have unclogged you couldn't have unclogged they couldn't have unclogged	I couldn't have been unclogging you couldn't have been unclogging he couldn't have been unclogging we couldn't have been unclogging you couldn't have been unclogging they couldn't have been unclogging

Interrogative form

Simple form	V-ing form
could I unclog? could you unclog? could he unclog? could we unclog? could you unclog? could they unclog?	could I be unclogging? could you be unclogging? could he be unclogging? could we be unclogging? could you be unclogging? could they be unclogging?
Perfect	V-ing perfect
could I have unclogged? could you have unclogged? could he have unclogged? could we have unclogged? could you have unclogged? could they have unclogged?	could I have been unclogging? could you have been unclogging? could he have been unclogging? could we have been unclogging? could you have been unclogging? could they have been unclogging?

Interro-negative form

Simple form	V-ing form
couldn't I unclog? couldn't you unclog? couldn't he unclog? couldn't we unclog? couldn't you unclog? couldn't they unclog?	couldn't I be unclogging? couldn't you be unclogging? couldn't he be unclogging? couldn't we be unclogging? couldn't you be unclogging? couldn't they be unclogging?
Perfect	V-ing perfect
couldn't I have unclogged? couldn't you have unclogged? couldn't he have unclogged? couldn't we have unclogged? couldn't you have unclogged? couldn't they have unclogged?	couldn't I have been unclogging? couldn't you have been unclogging? couldn't he have been unclogging? couldn't we have been unclogging? couldn't you have been unclogging? couldn't they have been unclogging?