I could tolerate you could tolerate he could tolerate we could tolerate you could tolerate they could tolerate
V-ing form
I could be tolerating you could be tolerating he could be tolerating we could be tolerating you could be tolerating they could be tolerating
Perfect
I could have tolerated you could have tolerated he could have tolerated we could have tolerated you could have tolerated they could have tolerated
V-ing perfect
I could have been tolerating you could have been tolerating he could have been tolerating we could have been tolerating you could have been tolerating they could have been tolerating
Negation
Simple form
I could not tolerate you could not tolerate he could not tolerate we could not tolerate you could not tolerate they could not tolerate
V-ing form
I could not be tolerating you could not be tolerating he could not be tolerating we could not be tolerating you could not be tolerating they could not be tolerating
Perfect
I could not have tolerated you could not have tolerated he could not have tolerated we could not have tolerated you could not have tolerated they could not have tolerated
V-ing perfect
I could not have been tolerating you could not have been tolerating he could not have been tolerating we could not have been tolerating you could not have been tolerating they could not have been tolerating
Interrogative form
Simple form
could I tolerate? could you tolerate? could he tolerate? could we tolerate? could you tolerate? could they tolerate?
V-ing form
could I be tolerating? could you be tolerating? could he be tolerating? could we be tolerating? could you be tolerating? could they be tolerating?
Perfect
could I have tolerated? could you have tolerated? could he have tolerated? could we have tolerated? could you have tolerated? could they have tolerated?
V-ing perfect
could I have been tolerating? could you have been tolerating? could he have been tolerating? could we have been tolerating? could you have been tolerating? could they have been tolerating?
Interro-negative form
Simple form
could I not tolerate? could you not tolerate? could he not tolerate? could we not tolerate? could you not tolerate? could they not tolerate?
V-ing form
could I not be tolerating? could you not be tolerating? could he not be tolerating? could we not be tolerating? could you not be tolerating? could they not be tolerating?
Perfect
could I not have tolerated? could you not have tolerated? could he not have tolerated? could we not have tolerated? could you not have tolerated? could they not have tolerated?
V-ing perfect
could I not have been tolerating? could you not have been tolerating? could he not have been tolerating? could we not have been tolerating? could you not have been tolerating? could they not have been tolerating?