I could apprentice you could apprentice he could apprentice we could apprentice you could apprentice they could apprentice
V-ing form
I could be apprenticing you could be apprenticing he could be apprenticing we could be apprenticing you could be apprenticing they could be apprenticing
Perfect
I could have apprenticed you could have apprenticed he could have apprenticed we could have apprenticed you could have apprenticed they could have apprenticed
V-ing perfect
I could have been apprenticing you could have been apprenticing he could have been apprenticing we could have been apprenticing you could have been apprenticing they could have been apprenticing
Negation
Simple form
I could not apprentice you could not apprentice he could not apprentice we could not apprentice you could not apprentice they could not apprentice
V-ing form
I could not be apprenticing you could not be apprenticing he could not be apprenticing we could not be apprenticing you could not be apprenticing they could not be apprenticing
Perfect
I could not have apprenticed you could not have apprenticed he could not have apprenticed we could not have apprenticed you could not have apprenticed they could not have apprenticed
V-ing perfect
I could not have been apprenticing you could not have been apprenticing he could not have been apprenticing we could not have been apprenticing you could not have been apprenticing they could not have been apprenticing
Interrogative form
Simple form
could I apprentice? could you apprentice? could he apprentice? could we apprentice? could you apprentice? could they apprentice?
V-ing form
could I be apprenticing? could you be apprenticing? could he be apprenticing? could we be apprenticing? could you be apprenticing? could they be apprenticing?
Perfect
could I have apprenticed? could you have apprenticed? could he have apprenticed? could we have apprenticed? could you have apprenticed? could they have apprenticed?
V-ing perfect
could I have been apprenticing? could you have been apprenticing? could he have been apprenticing? could we have been apprenticing? could you have been apprenticing? could they have been apprenticing?
Interro-negative form
Simple form
could I not apprentice? could you not apprentice? could he not apprentice? could we not apprentice? could you not apprentice? could they not apprentice?
V-ing form
could I not be apprenticing? could you not be apprenticing? could he not be apprenticing? could we not be apprenticing? could you not be apprenticing? could they not be apprenticing?
Perfect
could I not have apprenticed? could you not have apprenticed? could he not have apprenticed? could we not have apprenticed? could you not have apprenticed? could they not have apprenticed?
V-ing perfect
could I not have been apprenticing? could you not have been apprenticing? could he not have been apprenticing? could we not have been apprenticing? could you not have been apprenticing? could they not have been apprenticing?