English verb conjugation
COULD TOWER

Regular verb: tower - towered - towered

Affirmation

Simple form	V-ing form
I could tower you could tower she could tower we could tower you could tower they could tower	I could be towering you could be towering she could be towering we could be towering you could be towering they could be towering
Perfect	V-ing perfect
I could have towered you could have towered she could have towered we could have towered you could have towered they could have towered	I could have been towering you could have been towering she could have been towering we could have been towering you could have been towering they could have been towering

Negation

Simple form	V-ing form
I could not tower you could not tower she could not tower we could not tower you could not tower they could not tower	I could not be towering you could not be towering she could not be towering we could not be towering you could not be towering they could not be towering
Perfect	V-ing perfect
I could not have towered you could not have towered she could not have towered we could not have towered you could not have towered they could not have towered	I could not have been towering you could not have been towering she could not have been towering we could not have been towering you could not have been towering they could not have been towering

Interrogative form

Simple form	V-ing form
could I tower? could you tower? could she tower? could we tower? could you tower? could they tower?	could I be towering? could you be towering? could she be towering? could we be towering? could you be towering? could they be towering?
Perfect	V-ing perfect
could I have towered? could you have towered? could she have towered? could we have towered? could you have towered? could they have towered?	could I have been towering? could you have been towering? could she have been towering? could we have been towering? could you have been towering? could they have been towering?

Interro-negative form

Simple form	V-ing form
could I not tower? could you not tower? could she not tower? could we not tower? could you not tower? could they not tower?	could I not be towering? could you not be towering? could she not be towering? could we not be towering? could you not be towering? could they not be towering?
Perfect	V-ing perfect
could I not have towered? could you not have towered? could she not have towered? could we not have towered? could you not have towered? could they not have towered?	could I not have been towering? could you not have been towering? could she not have been towering? could we not have been towering? could you not have been towering? could they not have been towering?