I can windrow you can windrow she can windrow we can windrow you can windrow they can windrow
V-ing form
I can be windrowing you can be windrowing she can be windrowing we can be windrowing you can be windrowing they can be windrowing
Perfect
I can have windrowed you can have windrowed she can have windrowed we can have windrowed you can have windrowed they can have windrowed
V-ing perfect
I can have been windrowing you can have been windrowing she can have been windrowing we can have been windrowing you can have been windrowing they can have been windrowing
Negation
Simple form
I can't windrow you can't windrow she can't windrow we can't windrow you can't windrow they can't windrow
V-ing form
I can't be windrowing you can't be windrowing she can't be windrowing we can't be windrowing you can't be windrowing they can't be windrowing
Perfect
I can't have windrowed you can't have windrowed she can't have windrowed we can't have windrowed you can't have windrowed they can't have windrowed
V-ing perfect
I can't have been windrowing you can't have been windrowing she can't have been windrowing we can't have been windrowing you can't have been windrowing they can't have been windrowing
Interrogative form
Simple form
can I windrow? can you windrow? can she windrow? can we windrow? can you windrow? can they windrow?
V-ing form
can I be windrowing? can you be windrowing? can she be windrowing? can we be windrowing? can you be windrowing? can they be windrowing?
Perfect
can I have windrowed? can you have windrowed? can she have windrowed? can we have windrowed? can you have windrowed? can they have windrowed?
V-ing perfect
can I have been windrowing? can you have been windrowing? can she have been windrowing? can we have been windrowing? can you have been windrowing? can they have been windrowing?
Interro-negative form
Simple form
can't I windrow? can't you windrow? can't she windrow? can't we windrow? can't you windrow? can't they windrow?
V-ing form
can't I be windrowing? can't you be windrowing? can't she be windrowing? can't we be windrowing? can't you be windrowing? can't they be windrowing?
Perfect
can't I have windrowed? can't you have windrowed? can't she have windrowed? can't we have windrowed? can't you have windrowed? can't they have windrowed?
V-ing perfect
can't I have been windrowing? can't you have been windrowing? can't she have been windrowing? can't we have been windrowing? can't you have been windrowing? can't they have been windrowing?