English verb conjugation
COULD TOWER

Regular verb: tower - towered - towered

Affirmation

Simple form	V-ing form
I could tower you could tower he could tower we could tower you could tower they could tower	I could be towering you could be towering he 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 he 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 he 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 couldn't tower you couldn't tower he couldn't tower we couldn't tower you couldn't tower they couldn't tower	I couldn't be towering you couldn't be towering he couldn't be towering we couldn't be towering you couldn't be towering they couldn't be towering
Perfect	V-ing perfect
I couldn't have towered you couldn't have towered he couldn't have towered we couldn't have towered you couldn't have towered they couldn't have towered	I couldn't have been towering you couldn't have been towering he couldn't have been towering we couldn't have been towering you couldn't have been towering they couldn't have been towering

Interrogative form

Simple form	V-ing form
could I tower? could you tower? could he tower? could we tower? could you tower? could they tower?	could I be towering? could you be towering? could he 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 he 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 he 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
couldn't I tower? couldn't you tower? couldn't he tower? couldn't we tower? couldn't you tower? couldn't they tower?	couldn't I be towering? couldn't you be towering? couldn't he be towering? couldn't we be towering? couldn't you be towering? couldn't they be towering?
Perfect	V-ing perfect
couldn't I have towered? couldn't you have towered? couldn't he have towered? couldn't we have towered? couldn't you have towered? couldn't they have towered?	couldn't I have been towering? couldn't you have been towering? couldn't he have been towering? couldn't we have been towering? couldn't you have been towering? couldn't they have been towering?