I can sunder you can sunder he can sunder we can sunder you can sunder they can sunder
V-ing form
I can be sundering you can be sundering he can be sundering we can be sundering you can be sundering they can be sundering
Perfect
I can have sundered you can have sundered he can have sundered we can have sundered you can have sundered they can have sundered
V-ing perfect
I can have been sundering you can have been sundering he can have been sundering we can have been sundering you can have been sundering they can have been sundering
Negation
Simple form
I cannot sunder you cannot sunder he cannot sunder we cannot sunder you cannot sunder they cannot sunder
V-ing form
I cannot be sundering you cannot be sundering he cannot be sundering we cannot be sundering you cannot be sundering they cannot be sundering
Perfect
I cannot have sundered you cannot have sundered he cannot have sundered we cannot have sundered you cannot have sundered they cannot have sundered
V-ing perfect
I cannot have been sundering you cannot have been sundering he cannot have been sundering we cannot have been sundering you cannot have been sundering they cannot have been sundering
Interrogative form
Simple form
can I sunder? can you sunder? can he sunder? can we sunder? can you sunder? can they sunder?
V-ing form
can I be sundering? can you be sundering? can he be sundering? can we be sundering? can you be sundering? can they be sundering?
Perfect
can I have sundered? can you have sundered? can he have sundered? can we have sundered? can you have sundered? can they have sundered?
V-ing perfect
can I have been sundering? can you have been sundering? can he have been sundering? can we have been sundering? can you have been sundering? can they have been sundering?
Interro-negative form
Simple form
can I not sunder? can you not sunder? can he not sunder? can we not sunder? can you not sunder? can they not sunder?
V-ing form
can I not be sundering? can you not be sundering? can he not be sundering? can we not be sundering? can you not be sundering? can they not be sundering?
Perfect
can I not have sundered? can you not have sundered? can he not have sundered? can we not have sundered? can you not have sundered? can they not have sundered?
V-ing perfect
can I not have been sundering? can you not have been sundering? can he not have been sundering? can we not have been sundering? can you not have been sundering? can they not have been sundering?