English verb conjugation
COULD SPOT-WELD

Regular verb: spot-weld - spot-welded - spot-welded

Affirmation

Simple form	V-ing form
I could spot-weld you could spot-weld he could spot-weld we could spot-weld you could spot-weld they could spot-weld	I could be spot-welding you could be spot-welding he could be spot-welding we could be spot-welding you could be spot-welding they could be spot-welding
Perfect	V-ing perfect
I could have spot-welded you could have spot-welded he could have spot-welded we could have spot-welded you could have spot-welded they could have spot-welded	I could have been spot-welding you could have been spot-welding he could have been spot-welding we could have been spot-welding you could have been spot-welding they could have been spot-welding

Negation

Simple form	V-ing form
I couldn't spot-weld you couldn't spot-weld he couldn't spot-weld we couldn't spot-weld you couldn't spot-weld they couldn't spot-weld	I couldn't be spot-welding you couldn't be spot-welding he couldn't be spot-welding we couldn't be spot-welding you couldn't be spot-welding they couldn't be spot-welding
Perfect	V-ing perfect
I couldn't have spot-welded you couldn't have spot-welded he couldn't have spot-welded we couldn't have spot-welded you couldn't have spot-welded they couldn't have spot-welded	I couldn't have been spot-welding you couldn't have been spot-welding he couldn't have been spot-welding we couldn't have been spot-welding you couldn't have been spot-welding they couldn't have been spot-welding

Interrogative form

Simple form	V-ing form
could I spot-weld? could you spot-weld? could he spot-weld? could we spot-weld? could you spot-weld? could they spot-weld?	could I be spot-welding? could you be spot-welding? could he be spot-welding? could we be spot-welding? could you be spot-welding? could they be spot-welding?
Perfect	V-ing perfect
could I have spot-welded? could you have spot-welded? could he have spot-welded? could we have spot-welded? could you have spot-welded? could they have spot-welded?	could I have been spot-welding? could you have been spot-welding? could he have been spot-welding? could we have been spot-welding? could you have been spot-welding? could they have been spot-welding?

Interro-negative form

Simple form	V-ing form
couldn't I spot-weld? couldn't you spot-weld? couldn't he spot-weld? couldn't we spot-weld? couldn't you spot-weld? couldn't they spot-weld?	couldn't I be spot-welding? couldn't you be spot-welding? couldn't he be spot-welding? couldn't we be spot-welding? couldn't you be spot-welding? couldn't they be spot-welding?
Perfect	V-ing perfect
couldn't I have spot-welded? couldn't you have spot-welded? couldn't he have spot-welded? couldn't we have spot-welded? couldn't you have spot-welded? couldn't they have spot-welded?	couldn't I have been spot-welding? couldn't you have been spot-welding? couldn't he have been spot-welding? couldn't we have been spot-welding? couldn't you have been spot-welding? couldn't they have been spot-welding?