English verb conjugation
COULD TIER TIER TIER TIER

Regular verb: tier tier tier tier - tier tier tier tiered - tier tier tier tiered

Warning, this verb may not exist. Conjugation is given as example.

Affirmation

Simple form	V-ing form
I could tier tier tier tier you could tier tier tier tier she could tier tier tier tier we could tier tier tier tier you could tier tier tier tier they could tier tier tier tier	I could be tier tier tier tiering you could be tier tier tier tiering she could be tier tier tier tiering we could be tier tier tier tiering you could be tier tier tier tiering they could be tier tier tier tiering
Perfect	V-ing perfect
I could have tier tier tier tiered you could have tier tier tier tiered she could have tier tier tier tiered we could have tier tier tier tiered you could have tier tier tier tiered they could have tier tier tier tiered	I could have been tier tier tier tiering you could have been tier tier tier tiering she could have been tier tier tier tiering we could have been tier tier tier tiering you could have been tier tier tier tiering they could have been tier tier tier tiering

Negation

Simple form	V-ing form
I could not tier tier tier tier you could not tier tier tier tier she could not tier tier tier tier we could not tier tier tier tier you could not tier tier tier tier they could not tier tier tier tier	I could not be tier tier tier tiering you could not be tier tier tier tiering she could not be tier tier tier tiering we could not be tier tier tier tiering you could not be tier tier tier tiering they could not be tier tier tier tiering
Perfect	V-ing perfect
I could not have tier tier tier tiered you could not have tier tier tier tiered she could not have tier tier tier tiered we could not have tier tier tier tiered you could not have tier tier tier tiered they could not have tier tier tier tiered	I could not have been tier tier tier tiering you could not have been tier tier tier tiering she could not have been tier tier tier tiering we could not have been tier tier tier tiering you could not have been tier tier tier tiering they could not have been tier tier tier tiering

Interrogative form

Simple form	V-ing form
could I tier tier tier tier? could you tier tier tier tier? could she tier tier tier tier? could we tier tier tier tier? could you tier tier tier tier? could they tier tier tier tier?	could I be tier tier tier tiering? could you be tier tier tier tiering? could she be tier tier tier tiering? could we be tier tier tier tiering? could you be tier tier tier tiering? could they be tier tier tier tiering?
Perfect	V-ing perfect
could I have tier tier tier tiered? could you have tier tier tier tiered? could she have tier tier tier tiered? could we have tier tier tier tiered? could you have tier tier tier tiered? could they have tier tier tier tiered?	could I have been tier tier tier tiering? could you have been tier tier tier tiering? could she have been tier tier tier tiering? could we have been tier tier tier tiering? could you have been tier tier tier tiering? could they have been tier tier tier tiering?

Interro-negative form

Simple form	V-ing form
could I not tier tier tier tier? could you not tier tier tier tier? could she not tier tier tier tier? could we not tier tier tier tier? could you not tier tier tier tier? could they not tier tier tier tier?	could I not be tier tier tier tiering? could you not be tier tier tier tiering? could she not be tier tier tier tiering? could we not be tier tier tier tiering? could you not be tier tier tier tiering? could they not be tier tier tier tiering?
Perfect	V-ing perfect
could I not have tier tier tier tiered? could you not have tier tier tier tiered? could she not have tier tier tier tiered? could we not have tier tier tier tiered? could you not have tier tier tier tiered? could they not have tier tier tier tiered?	could I not have been tier tier tier tiering? could you not have been tier tier tier tiering? could she not have been tier tier tier tiering? could we not have been tier tier tier tiering? could you not have been tier tier tier tiering? could they not have been tier tier tier tiering?