could rototill
Regular verb: rototill - rototilled- rototilled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could rototill
you could rototill
he could rototill
we could rototill
you could rototill
they could rototill 	I could be rototilling
you could be rototilling
he could be rototilling
we could be rototilling
you could be rototilling
they could be rototilling	I could have rototilled
you could have rototilled
he could have rototilled
we could have rototilled
you could have rototilled
they could have rototilled	I could have been rototilling
you could have been rototilling
he could have been rototilling
we could have been rototilling
you could have been rototilling
they could have been rototilling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not rototill
you could not rototill
he could not rototill
we could not rototill
you could not rototill
they could not rototill 	I could not be rototilling
you could not be rototilling
he could not be rototilling
we could not be rototilling
you could not be rototilling
they could not be rototilling	I could not have rototilled
you could not have rototilled
he could not have rototilled
we could not have rototilled
you could not have rototilled
they could not have rototilled	I could not have been rototilling
you could not have been rototilling
he could not have been rototilling
we could not have been rototilling
you could not have been rototilling
they could not have been rototilling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I rototill?
could you rototill?
could he rototill?
could we rototill?
could you rototill?
could they rototill? 	could I be rototilling?
could you be rototilling?
could he be rototilling?
could we be rototilling?
could you be rototilling?
could they be rototilling? 	could I have rototilled?
could you have rototilled?
could he have rototilled?
could we have rototilled?
could you have rototilled?
could they have rototilled? 	could I have been rototilling?
could you have been rototilling?
could he have been rototilling?
could we have been rototilling?
could you have been rototilling?
could they have been rototilling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not rototill?
could you not rototill?
could he not rototill?
could we not rototill?
could you not rototill?
could they not rototill? 	could I not be rototilling?
could you not be rototilling?
could he not be rototilling?
could we not be rototilling?
could you not be rototilling?
could they not be rototilling? 	could I not have rototilled?
could you not have rototilled?
could he not have rototilled?
could we not have rototilled?
could you not have rototilled?
could they not have rototilled? 	could I not have been rototilling?
could you not have been rototilling?
could he not have been rototilling?
could we not have been rototilling?
could you not have been rototilling?
could they not have been rototilling?