I can ascend you can ascend she can ascend we can ascend you can ascend they can ascend
V-ing form
I can be ascending you can be ascending she can be ascending we can be ascending you can be ascending they can be ascending
Perfect
I can have ascended you can have ascended she can have ascended we can have ascended you can have ascended they can have ascended
V-ing perfect
I can have been ascending you can have been ascending she can have been ascending we can have been ascending you can have been ascending they can have been ascending
Negation
Simple form
I can't ascend you can't ascend she can't ascend we can't ascend you can't ascend they can't ascend
V-ing form
I can't be ascending you can't be ascending she can't be ascending we can't be ascending you can't be ascending they can't be ascending
Perfect
I can't have ascended you can't have ascended she can't have ascended we can't have ascended you can't have ascended they can't have ascended
V-ing perfect
I can't have been ascending you can't have been ascending she can't have been ascending we can't have been ascending you can't have been ascending they can't have been ascending
Interrogative form
Simple form
can I ascend? can you ascend? can she ascend? can we ascend? can you ascend? can they ascend?
V-ing form
can I be ascending? can you be ascending? can she be ascending? can we be ascending? can you be ascending? can they be ascending?
Perfect
can I have ascended? can you have ascended? can she have ascended? can we have ascended? can you have ascended? can they have ascended?
V-ing perfect
can I have been ascending? can you have been ascending? can she have been ascending? can we have been ascending? can you have been ascending? can they have been ascending?
Interro-negative form
Simple form
can't I ascend? can't you ascend? can't she ascend? can't we ascend? can't you ascend? can't they ascend?
V-ing form
can't I be ascending? can't you be ascending? can't she be ascending? can't we be ascending? can't you be ascending? can't they be ascending?
Perfect
can't I have ascended? can't you have ascended? can't she have ascended? can't we have ascended? can't you have ascended? can't they have ascended?
V-ing perfect
can't I have been ascending? can't you have been ascending? can't she have been ascending? can't we have been ascending? can't you have been ascending? can't they have been ascending?