I could hesitate you could hesitate he could hesitate we could hesitate you could hesitate they could hesitate
V-ing form
I could be hesitating you could be hesitating he could be hesitating we could be hesitating you could be hesitating they could be hesitating
Perfect
I could have hesitated you could have hesitated he could have hesitated we could have hesitated you could have hesitated they could have hesitated
V-ing perfect
I could have been hesitating you could have been hesitating he could have been hesitating we could have been hesitating you could have been hesitating they could have been hesitating
Negation
Simple form
I could not hesitate you could not hesitate he could not hesitate we could not hesitate you could not hesitate they could not hesitate
V-ing form
I could not be hesitating you could not be hesitating he could not be hesitating we could not be hesitating you could not be hesitating they could not be hesitating
Perfect
I could not have hesitated you could not have hesitated he could not have hesitated we could not have hesitated you could not have hesitated they could not have hesitated
V-ing perfect
I could not have been hesitating you could not have been hesitating he could not have been hesitating we could not have been hesitating you could not have been hesitating they could not have been hesitating
Interrogative form
Simple form
could I hesitate? could you hesitate? could he hesitate? could we hesitate? could you hesitate? could they hesitate?
V-ing form
could I be hesitating? could you be hesitating? could he be hesitating? could we be hesitating? could you be hesitating? could they be hesitating?
Perfect
could I have hesitated? could you have hesitated? could he have hesitated? could we have hesitated? could you have hesitated? could they have hesitated?
V-ing perfect
could I have been hesitating? could you have been hesitating? could he have been hesitating? could we have been hesitating? could you have been hesitating? could they have been hesitating?
Interro-negative form
Simple form
could I not hesitate? could you not hesitate? could he not hesitate? could we not hesitate? could you not hesitate? could they not hesitate?
V-ing form
could I not be hesitating? could you not be hesitating? could he not be hesitating? could we not be hesitating? could you not be hesitating? could they not be hesitating?
Perfect
could I not have hesitated? could you not have hesitated? could he not have hesitated? could we not have hesitated? could you not have hesitated? could they not have hesitated?
V-ing perfect
could I not have been hesitating? could you not have been hesitating? could he not have been hesitating? could we not have been hesitating? could you not have been hesitating? could they not have been hesitating?