could telescope
Regular verb: telescope - telescoped- telescoped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could telescope
you could telescope
he could telescope
we could telescope
you could telescope
they could telescope 	I could be telescoping
you could be telescoping
he could be telescoping
we could be telescoping
you could be telescoping
they could be telescoping	I could have telescoped
you could have telescoped
he could have telescoped
we could have telescoped
you could have telescoped
they could have telescoped	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 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't telescope
you couldn't telescope
he couldn't telescope
we couldn't telescope
you couldn't telescope
they couldn't telescope 	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	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	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 	V-ing form 	Perfect 	V-ing perfect 	
could I telescope?
could you telescope?
could he telescope?
could we telescope?
could you telescope?
could they telescope? 	could I be telescoping?
could you be telescoping?
could he be telescoping?
could we be telescoping?
could you be telescoping?
could they be telescoping? 	could I have telescoped?
could you have telescoped?
could he have telescoped?
could we have telescoped?
could you have telescoped?
could they have telescoped? 	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 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I telescope?
couldn't you telescope?
couldn't he telescope?
couldn't we telescope?
couldn't you telescope?
couldn't they telescope? 	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? 	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? 	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?