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 can't interfere you can't interfere he can't interfere we can't interfere you can't interfere they can't interfere
V-ing form
I can't be interfering you can't be interfering he can't be interfering we can't be interfering you can't be interfering they can't be interfering
Perfect
I can't have interfered you can't have interfered he can't have interfered we can't have interfered you can't have interfered they can't have interfered
V-ing perfect
I can't have been interfering you can't have been interfering he can't have been interfering we can't have been interfering you can't have been interfering they can't 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't I interfere? can't you interfere? can't he interfere? can't we interfere? can't you interfere? can't they interfere?
V-ing form
can't I be interfering? can't you be interfering? can't he be interfering? can't we be interfering? can't you be interfering? can't they be interfering?
Perfect
can't I have interfered? can't you have interfered? can't he have interfered? can't we have interfered? can't you have interfered? can't they have interfered?
V-ing perfect
can't I have been interfering? can't you have been interfering? can't he have been interfering? can't we have been interfering? can't you have been interfering? can't they have been interfering?