I can appreciate you can appreciate she can appreciate we can appreciate you can appreciate they can appreciate
V-ing form
I can be appreciating you can be appreciating she can be appreciating we can be appreciating you can be appreciating they can be appreciating
Perfect
I can have appreciated you can have appreciated she can have appreciated we can have appreciated you can have appreciated they can have appreciated
V-ing perfect
I can have been appreciating you can have been appreciating she can have been appreciating we can have been appreciating you can have been appreciating they can have been appreciating
Negation
Simple form
I cannot appreciate you cannot appreciate she cannot appreciate we cannot appreciate you cannot appreciate they cannot appreciate
V-ing form
I cannot be appreciating you cannot be appreciating she cannot be appreciating we cannot be appreciating you cannot be appreciating they cannot be appreciating
Perfect
I cannot have appreciated you cannot have appreciated she cannot have appreciated we cannot have appreciated you cannot have appreciated they cannot have appreciated
V-ing perfect
I cannot have been appreciating you cannot have been appreciating she cannot have been appreciating we cannot have been appreciating you cannot have been appreciating they cannot have been appreciating
Interrogative form
Simple form
can I appreciate? can you appreciate? can she appreciate? can we appreciate? can you appreciate? can they appreciate?
V-ing form
can I be appreciating? can you be appreciating? can she be appreciating? can we be appreciating? can you be appreciating? can they be appreciating?
Perfect
can I have appreciated? can you have appreciated? can she have appreciated? can we have appreciated? can you have appreciated? can they have appreciated?
V-ing perfect
can I have been appreciating? can you have been appreciating? can she have been appreciating? can we have been appreciating? can you have been appreciating? can they have been appreciating?
Interro-negative form
Simple form
can I not appreciate? can you not appreciate? can she not appreciate? can we not appreciate? can you not appreciate? can they not appreciate?
V-ing form
can I not be appreciating? can you not be appreciating? can she not be appreciating? can we not be appreciating? can you not be appreciating? can they not be appreciating?
Perfect
can I not have appreciated? can you not have appreciated? can she not have appreciated? can we not have appreciated? can you not have appreciated? can they not have appreciated?
V-ing perfect
can I not have been appreciating? can you not have been appreciating? can she not have been appreciating? can we not have been appreciating? can you not have been appreciating? can they not have been appreciating?