could apprehend
Regular verb: apprehend - apprehended- apprehended

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could apprehend
you could apprehend
she could apprehend
we could apprehend
you could apprehend
they could apprehend 	I could be apprehending
you could be apprehending
she could be apprehending
we could be apprehending
you could be apprehending
they could be apprehending	I could have apprehended
you could have apprehended
she 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
she 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 couldn't apprehend
you couldn't apprehend
she couldn't apprehend
we couldn't apprehend
you couldn't apprehend
they couldn't apprehend 	I couldn't be apprehending
you couldn't be apprehending
she couldn't be apprehending
we couldn't be apprehending
you couldn't be apprehending
they couldn't be apprehending	I couldn't have apprehended
you couldn't have apprehended
she couldn't have apprehended
we couldn't have apprehended
you couldn't have apprehended
they couldn't have apprehended	I couldn't have been apprehending
you couldn't have been apprehending
she couldn't have been apprehending
we couldn't have been apprehending
you couldn't have been apprehending
they couldn't have been apprehending	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I apprehend?
could you apprehend?
could she apprehend?
could we apprehend?
could you apprehend?
could they apprehend? 	could I be apprehending?
could you be apprehending?
could she be apprehending?
could we be apprehending?
could you be apprehending?
could they be apprehending? 	could I have apprehended?
could you have apprehended?
could she 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 she 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 	
couldn't I apprehend?
couldn't you apprehend?
couldn't she apprehend?
couldn't we apprehend?
couldn't you apprehend?
couldn't they apprehend? 	couldn't I be apprehending?
couldn't you be apprehending?
couldn't she be apprehending?
couldn't we be apprehending?
couldn't you be apprehending?
couldn't they be apprehending? 	couldn't I have apprehended?
couldn't you have apprehended?
couldn't she have apprehended?
couldn't we have apprehended?
couldn't you have apprehended?
couldn't they have apprehended? 	couldn't I have been apprehending?
couldn't you have been apprehending?
couldn't she have been apprehending?
couldn't we have been apprehending?
couldn't you have been apprehending?
couldn't they have been apprehending?