English verb conjugation
COULD TRAILER

Regular verb: trailer - trailered - trailered

Affirmation

Simple form	V-ing form
I could trailer you could trailer he could trailer we could trailer you could trailer they could trailer	I could be trailering you could be trailering he could be trailering we could be trailering you could be trailering they could be trailering
Perfect	V-ing perfect
I could have trailered you could have trailered he could have trailered we could have trailered you could have trailered they could have trailered	I could have been trailering you could have been trailering he could have been trailering we could have been trailering you could have been trailering they could have been trailering

Negation

Simple form	V-ing form
I couldn't trailer you couldn't trailer he couldn't trailer we couldn't trailer you couldn't trailer they couldn't trailer	I couldn't be trailering you couldn't be trailering he couldn't be trailering we couldn't be trailering you couldn't be trailering they couldn't be trailering
Perfect	V-ing perfect
I couldn't have trailered you couldn't have trailered he couldn't have trailered we couldn't have trailered you couldn't have trailered they couldn't have trailered	I couldn't have been trailering you couldn't have been trailering he couldn't have been trailering we couldn't have been trailering you couldn't have been trailering they couldn't have been trailering

Interrogative form

Simple form	V-ing form
could I trailer? could you trailer? could he trailer? could we trailer? could you trailer? could they trailer?	could I be trailering? could you be trailering? could he be trailering? could we be trailering? could you be trailering? could they be trailering?
Perfect	V-ing perfect
could I have trailered? could you have trailered? could he have trailered? could we have trailered? could you have trailered? could they have trailered?	could I have been trailering? could you have been trailering? could he have been trailering? could we have been trailering? could you have been trailering? could they have been trailering?

Interro-negative form

Simple form	V-ing form
couldn't I trailer? couldn't you trailer? couldn't he trailer? couldn't we trailer? couldn't you trailer? couldn't they trailer?	couldn't I be trailering? couldn't you be trailering? couldn't he be trailering? couldn't we be trailering? couldn't you be trailering? couldn't they be trailering?
Perfect	V-ing perfect
couldn't I have trailered? couldn't you have trailered? couldn't he have trailered? couldn't we have trailered? couldn't you have trailered? couldn't they have trailered?	couldn't I have been trailering? couldn't you have been trailering? couldn't he have been trailering? couldn't we have been trailering? couldn't you have been trailering? couldn't they have been trailering?