I can chase you can chase he can chase we can chase you can chase they can chase
V-ing form
I can be chasing you can be chasing he can be chasing we can be chasing you can be chasing they can be chasing
Perfect
I can have chased you can have chased he can have chased we can have chased you can have chased they can have chased
V-ing perfect
I can have been chasing you can have been chasing he can have been chasing we can have been chasing you can have been chasing they can have been chasing
Negation
Simple form
I cannot chase you cannot chase he cannot chase we cannot chase you cannot chase they cannot chase
V-ing form
I cannot be chasing you cannot be chasing he cannot be chasing we cannot be chasing you cannot be chasing they cannot be chasing
Perfect
I cannot have chased you cannot have chased he cannot have chased we cannot have chased you cannot have chased they cannot have chased
V-ing perfect
I cannot have been chasing you cannot have been chasing he cannot have been chasing we cannot have been chasing you cannot have been chasing they cannot have been chasing
Interrogative form
Simple form
can I chase? can you chase? can he chase? can we chase? can you chase? can they chase?
V-ing form
can I be chasing? can you be chasing? can he be chasing? can we be chasing? can you be chasing? can they be chasing?
Perfect
can I have chased? can you have chased? can he have chased? can we have chased? can you have chased? can they have chased?
V-ing perfect
can I have been chasing? can you have been chasing? can he have been chasing? can we have been chasing? can you have been chasing? can they have been chasing?
Interro-negative form
Simple form
can I not chase? can you not chase? can he not chase? can we not chase? can you not chase? can they not chase?
V-ing form
can I not be chasing? can you not be chasing? can he not be chasing? can we not be chasing? can you not be chasing? can they not be chasing?
Perfect
can I not have chased? can you not have chased? can he not have chased? can we not have chased? can you not have chased? can they not have chased?
V-ing perfect
can I not have been chasing? can you not have been chasing? can he not have been chasing? can we not have been chasing? can you not have been chasing? can they not have been chasing?