I could telescope you could telescope he could telescope we could telescope you could telescope they could telescope
V-ing form
I could be telescoping you could be telescoping he could be telescoping we could be telescoping you could be telescoping they could be telescoping
Perfect
I could have telescoped you could have telescoped he could have telescoped we could have telescoped you could have telescoped they could have telescoped
V-ing perfect
I could have been telescoping you could have been telescoping he could have been telescoping we could have been telescoping you could have been telescoping they could have been telescoping
Negation
Simple form
I couldn't telescope you couldn't telescope he couldn't telescope we couldn't telescope you couldn't telescope they couldn't telescope
V-ing form
I couldn't be telescoping you couldn't be telescoping he couldn't be telescoping we couldn't be telescoping you couldn't be telescoping they couldn't be telescoping
Perfect
I couldn't have telescoped you couldn't have telescoped he couldn't have telescoped we couldn't have telescoped you couldn't have telescoped they couldn't have telescoped
V-ing perfect
I couldn't have been telescoping you couldn't have been telescoping he couldn't have been telescoping we couldn't have been telescoping you couldn't have been telescoping they couldn't have been telescoping
Interrogative form
Simple form
could I telescope? could you telescope? could he telescope? could we telescope? could you telescope? could they telescope?
V-ing form
could I be telescoping? could you be telescoping? could he be telescoping? could we be telescoping? could you be telescoping? could they be telescoping?
Perfect
could I have telescoped? could you have telescoped? could he have telescoped? could we have telescoped? could you have telescoped? could they have telescoped?
V-ing perfect
could I have been telescoping? could you have been telescoping? could he have been telescoping? could we have been telescoping? could you have been telescoping? could they have been telescoping?
Interro-negative form
Simple form
couldn't I telescope? couldn't you telescope? couldn't he telescope? couldn't we telescope? couldn't you telescope? couldn't they telescope?
V-ing form
couldn't I be telescoping? couldn't you be telescoping? couldn't he be telescoping? couldn't we be telescoping? couldn't you be telescoping? couldn't they be telescoping?
Perfect
couldn't I have telescoped? couldn't you have telescoped? couldn't he have telescoped? couldn't we have telescoped? couldn't you have telescoped? couldn't they have telescoped?
V-ing perfect
couldn't I have been telescoping? couldn't you have been telescoping? couldn't he have been telescoping? couldn't we have been telescoping? couldn't you have been telescoping? couldn't they have been telescoping?