could crop
Regular verb: crop - cropped- cropped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could crop
you could crop
he could crop
we could crop
you could crop
they could crop 	I could be cropping
you could be cropping
he could be cropping
we could be cropping
you could be cropping
they could be cropping	I could have cropped
you could have cropped
he could have cropped
we could have cropped
you could have cropped
they could have cropped	I could have been cropping
you could have been cropping
he could have been cropping
we could have been cropping
you could have been cropping
they could have been cropping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't crop
you couldn't crop
he couldn't crop
we couldn't crop
you couldn't crop
they couldn't crop 	I couldn't be cropping
you couldn't be cropping
he couldn't be cropping
we couldn't be cropping
you couldn't be cropping
they couldn't be cropping	I couldn't have cropped
you couldn't have cropped
he couldn't have cropped
we couldn't have cropped
you couldn't have cropped
they couldn't have cropped	I couldn't have been cropping
you couldn't have been cropping
he couldn't have been cropping
we couldn't have been cropping
you couldn't have been cropping
they couldn't have been cropping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I crop?
could you crop?
could he crop?
could we crop?
could you crop?
could they crop? 	could I be cropping?
could you be cropping?
could he be cropping?
could we be cropping?
could you be cropping?
could they be cropping? 	could I have cropped?
could you have cropped?
could he have cropped?
could we have cropped?
could you have cropped?
could they have cropped? 	could I have been cropping?
could you have been cropping?
could he have been cropping?
could we have been cropping?
could you have been cropping?
could they have been cropping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I crop?
couldn't you crop?
couldn't he crop?
couldn't we crop?
couldn't you crop?
couldn't they crop? 	couldn't I be cropping?
couldn't you be cropping?
couldn't he be cropping?
couldn't we be cropping?
couldn't you be cropping?
couldn't they be cropping? 	couldn't I have cropped?
couldn't you have cropped?
couldn't he have cropped?
couldn't we have cropped?
couldn't you have cropped?
couldn't they have cropped? 	couldn't I have been cropping?
couldn't you have been cropping?
couldn't he have been cropping?
couldn't we have been cropping?
couldn't you have been cropping?
couldn't they have been cropping?