could crank
Regular verb: crank - cranked- cranked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could crank
you could crank
he could crank
we could crank
you could crank
they could crank 	I could be cranking
you could be cranking
he could be cranking
we could be cranking
you could be cranking
they could be cranking	I could have cranked
you could have cranked
he could have cranked
we could have cranked
you could have cranked
they could have cranked	I could have been cranking
you could have been cranking
he could have been cranking
we could have been cranking
you could have been cranking
they could have been cranking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't crank
you couldn't crank
he couldn't crank
we couldn't crank
you couldn't crank
they couldn't crank 	I couldn't be cranking
you couldn't be cranking
he couldn't be cranking
we couldn't be cranking
you couldn't be cranking
they couldn't be cranking	I couldn't have cranked
you couldn't have cranked
he couldn't have cranked
we couldn't have cranked
you couldn't have cranked
they couldn't have cranked	I couldn't have been cranking
you couldn't have been cranking
he couldn't have been cranking
we couldn't have been cranking
you couldn't have been cranking
they couldn't have been cranking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I crank?
could you crank?
could he crank?
could we crank?
could you crank?
could they crank? 	could I be cranking?
could you be cranking?
could he be cranking?
could we be cranking?
could you be cranking?
could they be cranking? 	could I have cranked?
could you have cranked?
could he have cranked?
could we have cranked?
could you have cranked?
could they have cranked? 	could I have been cranking?
could you have been cranking?
could he have been cranking?
could we have been cranking?
could you have been cranking?
could they have been cranking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I crank?
couldn't you crank?
couldn't he crank?
couldn't we crank?
couldn't you crank?
couldn't they crank? 	couldn't I be cranking?
couldn't you be cranking?
couldn't he be cranking?
couldn't we be cranking?
couldn't you be cranking?
couldn't they be cranking? 	couldn't I have cranked?
couldn't you have cranked?
couldn't he have cranked?
couldn't we have cranked?
couldn't you have cranked?
couldn't they have cranked? 	couldn't I have been cranking?
couldn't you have been cranking?
couldn't he have been cranking?
couldn't we have been cranking?
couldn't you have been cranking?
couldn't they have been cranking?