could short
Regular verb: short - shorted- shorted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could short
you could short
he could short
we could short
you could short
they could short 	I could be shorting
you could be shorting
he could be shorting
we could be shorting
you could be shorting
they could be shorting	I could have shorted
you could have shorted
he could have shorted
we could have shorted
you could have shorted
they could have shorted	I could have been shorting
you could have been shorting
he could have been shorting
we could have been shorting
you could have been shorting
they could have been shorting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't short
you couldn't short
he couldn't short
we couldn't short
you couldn't short
they couldn't short 	I couldn't be shorting
you couldn't be shorting
he couldn't be shorting
we couldn't be shorting
you couldn't be shorting
they couldn't be shorting	I couldn't have shorted
you couldn't have shorted
he couldn't have shorted
we couldn't have shorted
you couldn't have shorted
they couldn't have shorted	I couldn't have been shorting
you couldn't have been shorting
he couldn't have been shorting
we couldn't have been shorting
you couldn't have been shorting
they couldn't have been shorting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I short?
could you short?
could he short?
could we short?
could you short?
could they short? 	could I be shorting?
could you be shorting?
could he be shorting?
could we be shorting?
could you be shorting?
could they be shorting? 	could I have shorted?
could you have shorted?
could he have shorted?
could we have shorted?
could you have shorted?
could they have shorted? 	could I have been shorting?
could you have been shorting?
could he have been shorting?
could we have been shorting?
could you have been shorting?
could they have been shorting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I short?
couldn't you short?
couldn't he short?
couldn't we short?
couldn't you short?
couldn't they short? 	couldn't I be shorting?
couldn't you be shorting?
couldn't he be shorting?
couldn't we be shorting?
couldn't you be shorting?
couldn't they be shorting? 	couldn't I have shorted?
couldn't you have shorted?
couldn't he have shorted?
couldn't we have shorted?
couldn't you have shorted?
couldn't they have shorted? 	couldn't I have been shorting?
couldn't you have been shorting?
couldn't he have been shorting?
couldn't we have been shorting?
couldn't you have been shorting?
couldn't they have been shorting?