I can devitalise you can devitalise she can devitalise we can devitalise you can devitalise they can devitalise
V-ing form
I can be devitalising you can be devitalising she can be devitalising we can be devitalising you can be devitalising they can be devitalising
Perfect
I can have devitalised you can have devitalised she can have devitalised we can have devitalised you can have devitalised they can have devitalised
V-ing perfect
I can have been devitalising you can have been devitalising she can have been devitalising we can have been devitalising you can have been devitalising they can have been devitalising
Negation
Simple form
I cannot devitalise you cannot devitalise she cannot devitalise we cannot devitalise you cannot devitalise they cannot devitalise
V-ing form
I cannot be devitalising you cannot be devitalising she cannot be devitalising we cannot be devitalising you cannot be devitalising they cannot be devitalising
Perfect
I cannot have devitalised you cannot have devitalised she cannot have devitalised we cannot have devitalised you cannot have devitalised they cannot have devitalised
V-ing perfect
I cannot have been devitalising you cannot have been devitalising she cannot have been devitalising we cannot have been devitalising you cannot have been devitalising they cannot have been devitalising
Interrogative form
Simple form
can I devitalise? can you devitalise? can she devitalise? can we devitalise? can you devitalise? can they devitalise?
V-ing form
can I be devitalising? can you be devitalising? can she be devitalising? can we be devitalising? can you be devitalising? can they be devitalising?
Perfect
can I have devitalised? can you have devitalised? can she have devitalised? can we have devitalised? can you have devitalised? can they have devitalised?
V-ing perfect
can I have been devitalising? can you have been devitalising? can she have been devitalising? can we have been devitalising? can you have been devitalising? can they have been devitalising?
Interro-negative form
Simple form
can I not devitalise? can you not devitalise? can she not devitalise? can we not devitalise? can you not devitalise? can they not devitalise?
V-ing form
can I not be devitalising? can you not be devitalising? can she not be devitalising? can we not be devitalising? can you not be devitalising? can they not be devitalising?
Perfect
can I not have devitalised? can you not have devitalised? can she not have devitalised? can we not have devitalised? can you not have devitalised? can they not have devitalised?
V-ing perfect
can I not have been devitalising? can you not have been devitalising? can she not have been devitalising? can we not have been devitalising? can you not have been devitalising? can they not have been devitalising?