I can interfere you can interfere he can interfere we can interfere you can interfere they can interfere
V-ing form
I can be interfering you can be interfering he can be interfering we can be interfering you can be interfering they can be interfering
Perfect
I can have interfered you can have interfered he can have interfered we can have interfered you can have interfered they can have interfered
V-ing perfect
I can have been interfering you can have been interfering he can have been interfering we can have been interfering you can have been interfering they can have been interfering
Negation
Simple form
I cannot interfere you cannot interfere he cannot interfere we cannot interfere you cannot interfere they cannot interfere
V-ing form
I cannot be interfering you cannot be interfering he cannot be interfering we cannot be interfering you cannot be interfering they cannot be interfering
Perfect
I cannot have interfered you cannot have interfered he cannot have interfered we cannot have interfered you cannot have interfered they cannot have interfered
V-ing perfect
I cannot have been interfering you cannot have been interfering he cannot have been interfering we cannot have been interfering you cannot have been interfering they cannot have been interfering
Interrogative form
Simple form
can I interfere? can you interfere? can he interfere? can we interfere? can you interfere? can they interfere?
V-ing form
can I be interfering? can you be interfering? can he be interfering? can we be interfering? can you be interfering? can they be interfering?
Perfect
can I have interfered? can you have interfered? can he have interfered? can we have interfered? can you have interfered? can they have interfered?
V-ing perfect
can I have been interfering? can you have been interfering? can he have been interfering? can we have been interfering? can you have been interfering? can they have been interfering?
Interro-negative form
Simple form
can I not interfere? can you not interfere? can he not interfere? can we not interfere? can you not interfere? can they not interfere?
V-ing form
can I not be interfering? can you not be interfering? can he not be interfering? can we not be interfering? can you not be interfering? can they not be interfering?
Perfect
can I not have interfered? can you not have interfered? can he not have interfered? can we not have interfered? can you not have interfered? can they not have interfered?
V-ing perfect
can I not have been interfering? can you not have been interfering? can he not have been interfering? can we not have been interfering? can you not have been interfering? can they not have been interfering?