I could pasture you could pasture he could pasture we could pasture you could pasture they could pasture
V-ing form
I could be pasturing you could be pasturing he could be pasturing we could be pasturing you could be pasturing they could be pasturing
Perfect
I could have pastured you could have pastured he could have pastured we could have pastured you could have pastured they could have pastured
V-ing perfect
I could have been pasturing you could have been pasturing he could have been pasturing we could have been pasturing you could have been pasturing they could have been pasturing
Negation
Simple form
I could not pasture you could not pasture he could not pasture we could not pasture you could not pasture they could not pasture
V-ing form
I could not be pasturing you could not be pasturing he could not be pasturing we could not be pasturing you could not be pasturing they could not be pasturing
Perfect
I could not have pastured you could not have pastured he could not have pastured we could not have pastured you could not have pastured they could not have pastured
V-ing perfect
I could not have been pasturing you could not have been pasturing he could not have been pasturing we could not have been pasturing you could not have been pasturing they could not have been pasturing
Interrogative form
Simple form
could I pasture? could you pasture? could he pasture? could we pasture? could you pasture? could they pasture?
V-ing form
could I be pasturing? could you be pasturing? could he be pasturing? could we be pasturing? could you be pasturing? could they be pasturing?
Perfect
could I have pastured? could you have pastured? could he have pastured? could we have pastured? could you have pastured? could they have pastured?
V-ing perfect
could I have been pasturing? could you have been pasturing? could he have been pasturing? could we have been pasturing? could you have been pasturing? could they have been pasturing?
Interro-negative form
Simple form
could I not pasture? could you not pasture? could he not pasture? could we not pasture? could you not pasture? could they not pasture?
V-ing form
could I not be pasturing? could you not be pasturing? could he not be pasturing? could we not be pasturing? could you not be pasturing? could they not be pasturing?
Perfect
could I not have pastured? could you not have pastured? could he not have pastured? could we not have pastured? could you not have pastured? could they not have pastured?
V-ing perfect
could I not have been pasturing? could you not have been pasturing? could he not have been pasturing? could we not have been pasturing? could you not have been pasturing? could they not have been pasturing?