could apprehend
Regular verb: apprehend - apprehended- apprehended

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could apprehend
you could apprehend
he could apprehend
we could apprehend
you could apprehend
they could apprehend 	I could be apprehending
you could be apprehending
he could be apprehending
we could be apprehending
you could be apprehending
they could be apprehending	I could have apprehended
you could have apprehended
he could have apprehended
we could have apprehended
you could have apprehended
they could have apprehended	I could have been apprehending
you could have been apprehending
he could have been apprehending
we could have been apprehending
you could have been apprehending
they could have been apprehending	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not apprehend
you could not apprehend
he could not apprehend
we could not apprehend
you could not apprehend
they could not apprehend 	I could not be apprehending
you could not be apprehending
he could not be apprehending
we could not be apprehending
you could not be apprehending
they could not be apprehending	I could not have apprehended
you could not have apprehended
he could not have apprehended
we could not have apprehended
you could not have apprehended
they could not have apprehended	I could not have been apprehending
you could not have been apprehending
he could not have been apprehending
we could not have been apprehending
you could not have been apprehending
they could not have been apprehending	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I apprehend?
could you apprehend?
could he apprehend?
could we apprehend?
could you apprehend?
could they apprehend? 	could I be apprehending?
could you be apprehending?
could he be apprehending?
could we be apprehending?
could you be apprehending?
could they be apprehending? 	could I have apprehended?
could you have apprehended?
could he have apprehended?
could we have apprehended?
could you have apprehended?
could they have apprehended? 	could I have been apprehending?
could you have been apprehending?
could he have been apprehending?
could we have been apprehending?
could you have been apprehending?
could they have been apprehending? 	

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