English verb conjugation
COULD TOW

Regular verb: tow - towed - towed

Affirmation

Simple form	V-ing form
I could tow you could tow he could tow we could tow you could tow they could tow	I could be towing you could be towing he could be towing we could be towing you could be towing they could be towing
Perfect	V-ing perfect
I could have towed you could have towed he could have towed we could have towed you could have towed they could have towed	I could have been towing you could have been towing he could have been towing we could have been towing you could have been towing they could have been towing

Negation

Simple form	V-ing form
I couldn't tow you couldn't tow he couldn't tow we couldn't tow you couldn't tow they couldn't tow	I couldn't be towing you couldn't be towing he couldn't be towing we couldn't be towing you couldn't be towing they couldn't be towing
Perfect	V-ing perfect
I couldn't have towed you couldn't have towed he couldn't have towed we couldn't have towed you couldn't have towed they couldn't have towed	I couldn't have been towing you couldn't have been towing he couldn't have been towing we couldn't have been towing you couldn't have been towing they couldn't have been towing

Interrogative form

Simple form	V-ing form
could I tow? could you tow? could he tow? could we tow? could you tow? could they tow?	could I be towing? could you be towing? could he be towing? could we be towing? could you be towing? could they be towing?
Perfect	V-ing perfect
could I have towed? could you have towed? could he have towed? could we have towed? could you have towed? could they have towed?	could I have been towing? could you have been towing? could he have been towing? could we have been towing? could you have been towing? could they have been towing?

Interro-negative form

Simple form	V-ing form
couldn't I tow? couldn't you tow? couldn't he tow? couldn't we tow? couldn't you tow? couldn't they tow?	couldn't I be towing? couldn't you be towing? couldn't he be towing? couldn't we be towing? couldn't you be towing? couldn't they be towing?
Perfect	V-ing perfect
couldn't I have towed? couldn't you have towed? couldn't he have towed? couldn't we have towed? couldn't you have towed? couldn't they have towed?	couldn't I have been towing? couldn't you have been towing? couldn't he have been towing? couldn't we have been towing? couldn't you have been towing? couldn't they have been towing?