I can apprehend you can apprehend she can apprehend we can apprehend you can apprehend they can apprehend
V-ing form
I can be apprehending you can be apprehending she can be apprehending we can be apprehending you can be apprehending they can be apprehending
Perfect
I can have apprehended you can have apprehended she can have apprehended we can have apprehended you can have apprehended they can have apprehended
V-ing perfect
I can have been apprehending you can have been apprehending she can have been apprehending we can have been apprehending you can have been apprehending they can have been apprehending
Negation
Simple form
I can't apprehend you can't apprehend she can't apprehend we can't apprehend you can't apprehend they can't apprehend
V-ing form
I can't be apprehending you can't be apprehending she can't be apprehending we can't be apprehending you can't be apprehending they can't be apprehending
Perfect
I can't have apprehended you can't have apprehended she can't have apprehended we can't have apprehended you can't have apprehended they can't have apprehended
V-ing perfect
I can't have been apprehending you can't have been apprehending she can't have been apprehending we can't have been apprehending you can't have been apprehending they can't have been apprehending
Interrogative form
Simple form
can I apprehend? can you apprehend? can she apprehend? can we apprehend? can you apprehend? can they apprehend?
V-ing form
can I be apprehending? can you be apprehending? can she be apprehending? can we be apprehending? can you be apprehending? can they be apprehending?
Perfect
can I have apprehended? can you have apprehended? can she have apprehended? can we have apprehended? can you have apprehended? can they have apprehended?
V-ing perfect
can I have been apprehending? can you have been apprehending? can she have been apprehending? can we have been apprehending? can you have been apprehending? can they have been apprehending?
Interro-negative form
Simple form
can't I apprehend? can't you apprehend? can't she apprehend? can't we apprehend? can't you apprehend? can't they apprehend?
V-ing form
can't I be apprehending? can't you be apprehending? can't she be apprehending? can't we be apprehending? can't you be apprehending? can't they be apprehending?
Perfect
can't I have apprehended? can't you have apprehended? can't she have apprehended? can't we have apprehended? can't you have apprehended? can't they have apprehended?
V-ing perfect
can't I have been apprehending? can't you have been apprehending? can't she have been apprehending? can't we have been apprehending? can't you have been apprehending? can't they have been apprehending?