I can blackguard you can blackguard he can blackguard we can blackguard you can blackguard they can blackguard
V-ing form
I can be blackguarding you can be blackguarding he can be blackguarding we can be blackguarding you can be blackguarding they can be blackguarding
Perfect
I can have blackguarded you can have blackguarded he can have blackguarded we can have blackguarded you can have blackguarded they can have blackguarded
V-ing perfect
I can have been blackguarding you can have been blackguarding he can have been blackguarding we can have been blackguarding you can have been blackguarding they can have been blackguarding
Negation
Simple form
I cannot blackguard you cannot blackguard he cannot blackguard we cannot blackguard you cannot blackguard they cannot blackguard
V-ing form
I cannot be blackguarding you cannot be blackguarding he cannot be blackguarding we cannot be blackguarding you cannot be blackguarding they cannot be blackguarding
Perfect
I cannot have blackguarded you cannot have blackguarded he cannot have blackguarded we cannot have blackguarded you cannot have blackguarded they cannot have blackguarded
V-ing perfect
I cannot have been blackguarding you cannot have been blackguarding he cannot have been blackguarding we cannot have been blackguarding you cannot have been blackguarding they cannot have been blackguarding
Interrogative form
Simple form
can I blackguard? can you blackguard? can he blackguard? can we blackguard? can you blackguard? can they blackguard?
V-ing form
can I be blackguarding? can you be blackguarding? can he be blackguarding? can we be blackguarding? can you be blackguarding? can they be blackguarding?
Perfect
can I have blackguarded? can you have blackguarded? can he have blackguarded? can we have blackguarded? can you have blackguarded? can they have blackguarded?
V-ing perfect
can I have been blackguarding? can you have been blackguarding? can he have been blackguarding? can we have been blackguarding? can you have been blackguarding? can they have been blackguarding?
Interro-negative form
Simple form
can I not blackguard? can you not blackguard? can he not blackguard? can we not blackguard? can you not blackguard? can they not blackguard?
V-ing form
can I not be blackguarding? can you not be blackguarding? can he not be blackguarding? can we not be blackguarding? can you not be blackguarding? can they not be blackguarding?
Perfect
can I not have blackguarded? can you not have blackguarded? can he not have blackguarded? can we not have blackguarded? can you not have blackguarded? can they not have blackguarded?
V-ing perfect
can I not have been blackguarding? can you not have been blackguarding? can he not have been blackguarding? can we not have been blackguarding? can you not have been blackguarding? can they not have been blackguarding?