I can apprehend you can apprehend he can apprehend we can apprehend you can apprehend they can apprehend
V-ing form
I can be apprehending you can be apprehending he can be apprehending we can be apprehending you can be apprehending they can be apprehending
Perfect
I can have apprehended you can have apprehended he 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 he can have been apprehending we can have been apprehending you can have been apprehending they can have been apprehending
Negation
Simple form
I cannot apprehend you cannot apprehend he cannot apprehend we cannot apprehend you cannot apprehend they cannot apprehend
V-ing form
I cannot be apprehending you cannot be apprehending he cannot be apprehending we cannot be apprehending you cannot be apprehending they cannot be apprehending
Perfect
I cannot have apprehended you cannot have apprehended he cannot have apprehended we cannot have apprehended you cannot have apprehended they cannot have apprehended
V-ing perfect
I cannot have been apprehending you cannot have been apprehending he cannot have been apprehending we cannot have been apprehending you cannot have been apprehending they cannot have been apprehending
Interrogative form
Simple form
can I apprehend? can you apprehend? can he apprehend? can we apprehend? can you apprehend? can they apprehend?
V-ing form
can I be apprehending? can you be apprehending? can he be apprehending? can we be apprehending? can you be apprehending? can they be apprehending?
Perfect
can I have apprehended? can you have apprehended? can he 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 he have been apprehending? can we have been apprehending? can you have been apprehending? can they have been apprehending?
Interro-negative form
Simple form
can I not apprehend? can you not apprehend? can he not apprehend? can we not apprehend? can you not apprehend? can they not apprehend?
V-ing form
can I not be apprehending? can you not be apprehending? can he not be apprehending? can we not be apprehending? can you not be apprehending? can they not be apprehending?
Perfect
can I not have apprehended? can you not have apprehended? can he not have apprehended? can we not have apprehended? can you not have apprehended? can they not have apprehended?
V-ing perfect
can I not have been apprehending? can you not have been apprehending? can he not have been apprehending? can we not have been apprehending? can you not have been apprehending? can they not have been apprehending?