English verb conjugation
COULD CROP

Regular verb: crop - cropped - cropped

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?