I can cause you can cause she can cause we can cause you can cause they can cause
V-ing form
I can be causing you can be causing she can be causing we can be causing you can be causing they can be causing
Perfect
I can have caused you can have caused she can have caused we can have caused you can have caused they can have caused
V-ing perfect
I can have been causing you can have been causing she can have been causing we can have been causing you can have been causing they can have been causing
Negation
Simple form
I cannot cause you cannot cause she cannot cause we cannot cause you cannot cause they cannot cause
V-ing form
I cannot be causing you cannot be causing she cannot be causing we cannot be causing you cannot be causing they cannot be causing
Perfect
I cannot have caused you cannot have caused she cannot have caused we cannot have caused you cannot have caused they cannot have caused
V-ing perfect
I cannot have been causing you cannot have been causing she cannot have been causing we cannot have been causing you cannot have been causing they cannot have been causing
Interrogative form
Simple form
can I cause? can you cause? can she cause? can we cause? can you cause? can they cause?
V-ing form
can I be causing? can you be causing? can she be causing? can we be causing? can you be causing? can they be causing?
Perfect
can I have caused? can you have caused? can she have caused? can we have caused? can you have caused? can they have caused?
V-ing perfect
can I have been causing? can you have been causing? can she have been causing? can we have been causing? can you have been causing? can they have been causing?
Interro-negative form
Simple form
can I not cause? can you not cause? can she not cause? can we not cause? can you not cause? can they not cause?
V-ing form
can I not be causing? can you not be causing? can she not be causing? can we not be causing? can you not be causing? can they not be causing?
Perfect
can I not have caused? can you not have caused? can she not have caused? can we not have caused? can you not have caused? can they not have caused?
V-ing perfect
can I not have been causing? can you not have been causing? can she not have been causing? can we not have been causing? can you not have been causing? can they not have been causing?