I could bestride you could bestride he could bestride we could bestride you could bestride they could bestride
V-ing form
I could be bestriding you could be bestriding he could be bestriding we could be bestriding you could be bestriding they could be bestriding
Perfect
I could have bestrode, bestrid you could have bestrode, bestrid he could have bestrode, bestrid we could have bestrode, bestrid you could have bestrode, bestrid they could have bestrode, bestrid
V-ing perfect
I could have been bestriding you could have been bestriding he could have been bestriding we could have been bestriding you could have been bestriding they could have been bestriding
Negation
Simple form
I couldn't bestride you couldn't bestride he couldn't bestride we couldn't bestride you couldn't bestride they couldn't bestride
V-ing form
I couldn't be bestriding you couldn't be bestriding he couldn't be bestriding we couldn't be bestriding you couldn't be bestriding they couldn't be bestriding
Perfect
I couldn't have bestrode, bestrid you couldn't have bestrode, bestrid he couldn't have bestrode, bestrid we couldn't have bestrode, bestrid you couldn't have bestrode, bestrid they couldn't have bestrode, bestrid
V-ing perfect
I couldn't have been bestriding you couldn't have been bestriding he couldn't have been bestriding we couldn't have been bestriding you couldn't have been bestriding they couldn't have been bestriding
Interrogative form
Simple form
could I bestride? could you bestride? could he bestride? could we bestride? could you bestride? could they bestride?
V-ing form
could I be bestriding? could you be bestriding? could he be bestriding? could we be bestriding? could you be bestriding? could they be bestriding?
Perfect
could I have bestrode, bestrid? could you have bestrode, bestrid? could he have bestrode, bestrid? could we have bestrode, bestrid? could you have bestrode, bestrid? could they have bestrode, bestrid?
V-ing perfect
could I have been bestriding? could you have been bestriding? could he have been bestriding? could we have been bestriding? could you have been bestriding? could they have been bestriding?
Interro-negative form
Simple form
couldn't I bestride? couldn't you bestride? couldn't he bestride? couldn't we bestride? couldn't you bestride? couldn't they bestride?
V-ing form
couldn't I be bestriding? couldn't you be bestriding? couldn't he be bestriding? couldn't we be bestriding? couldn't you be bestriding? couldn't they be bestriding?
Perfect
couldn't I have bestrode, bestrid? couldn't you have bestrode, bestrid? couldn't he have bestrode, bestrid? couldn't we have bestrode, bestrid? couldn't you have bestrode, bestrid? couldn't they have bestrode, bestrid?
V-ing perfect
couldn't I have been bestriding? couldn't you have been bestriding? couldn't he have been bestriding? couldn't we have been bestriding? couldn't you have been bestriding? couldn't they have been bestriding?