I can asseverate you can asseverate he can asseverate we can asseverate you can asseverate they can asseverate
V-ing form
I can be asseverating you can be asseverating he can be asseverating we can be asseverating you can be asseverating they can be asseverating
Perfect
I can have asseverated you can have asseverated he can have asseverated we can have asseverated you can have asseverated they can have asseverated
V-ing perfect
I can have been asseverating you can have been asseverating he can have been asseverating we can have been asseverating you can have been asseverating they can have been asseverating
Negation
Simple form
I cannot asseverate you cannot asseverate he cannot asseverate we cannot asseverate you cannot asseverate they cannot asseverate
V-ing form
I cannot be asseverating you cannot be asseverating he cannot be asseverating we cannot be asseverating you cannot be asseverating they cannot be asseverating
Perfect
I cannot have asseverated you cannot have asseverated he cannot have asseverated we cannot have asseverated you cannot have asseverated they cannot have asseverated
V-ing perfect
I cannot have been asseverating you cannot have been asseverating he cannot have been asseverating we cannot have been asseverating you cannot have been asseverating they cannot have been asseverating
Interrogative form
Simple form
can I asseverate? can you asseverate? can he asseverate? can we asseverate? can you asseverate? can they asseverate?
V-ing form
can I be asseverating? can you be asseverating? can he be asseverating? can we be asseverating? can you be asseverating? can they be asseverating?
Perfect
can I have asseverated? can you have asseverated? can he have asseverated? can we have asseverated? can you have asseverated? can they have asseverated?
V-ing perfect
can I have been asseverating? can you have been asseverating? can he have been asseverating? can we have been asseverating? can you have been asseverating? can they have been asseverating?
Interro-negative form
Simple form
can I not asseverate? can you not asseverate? can he not asseverate? can we not asseverate? can you not asseverate? can they not asseverate?
V-ing form
can I not be asseverating? can you not be asseverating? can he not be asseverating? can we not be asseverating? can you not be asseverating? can they not be asseverating?
Perfect
can I not have asseverated? can you not have asseverated? can he not have asseverated? can we not have asseverated? can you not have asseverated? can they not have asseverated?
V-ing perfect
can I not have been asseverating? can you not have been asseverating? can he not have been asseverating? can we not have been asseverating? can you not have been asseverating? can they not have been asseverating?