I can upset you can upset he can upset we can upset you can upset they can upset
V-ing form
I can be upsetting you can be upsetting he can be upsetting we can be upsetting you can be upsetting they can be upsetting
Perfect
I can have upset you can have upset he can have upset we can have upset you can have upset they can have upset
V-ing perfect
I can have been upsetting you can have been upsetting he can have been upsetting we can have been upsetting you can have been upsetting they can have been upsetting
Negation
Simple form
I can't upset you can't upset he can't upset we can't upset you can't upset they can't upset
V-ing form
I can't be upsetting you can't be upsetting he can't be upsetting we can't be upsetting you can't be upsetting they can't be upsetting
Perfect
I can't have upset you can't have upset he can't have upset we can't have upset you can't have upset they can't have upset
V-ing perfect
I can't have been upsetting you can't have been upsetting he can't have been upsetting we can't have been upsetting you can't have been upsetting they can't have been upsetting
Interrogative form
Simple form
can I upset? can you upset? can he upset? can we upset? can you upset? can they upset?
V-ing form
can I be upsetting? can you be upsetting? can he be upsetting? can we be upsetting? can you be upsetting? can they be upsetting?
Perfect
can I have upset? can you have upset? can he have upset? can we have upset? can you have upset? can they have upset?
V-ing perfect
can I have been upsetting? can you have been upsetting? can he have been upsetting? can we have been upsetting? can you have been upsetting? can they have been upsetting?
Interro-negative form
Simple form
can't I upset? can't you upset? can't he upset? can't we upset? can't you upset? can't they upset?
V-ing form
can't I be upsetting? can't you be upsetting? can't he be upsetting? can't we be upsetting? can't you be upsetting? can't they be upsetting?
Perfect
can't I have upset? can't you have upset? can't he have upset? can't we have upset? can't you have upset? can't they have upset?
V-ing perfect
can't I have been upsetting? can't you have been upsetting? can't he have been upsetting? can't we have been upsetting? can't you have been upsetting? can't they have been upsetting?