I could breast-feed you could breast-feed he could breast-feed we could breast-feed you could breast-feed they could breast-feed
V-ing form
I could be breast-feeding you could be breast-feeding he could be breast-feeding we could be breast-feeding you could be breast-feeding they could be breast-feeding
Perfect
I could have breast-fed you could have breast-fed he could have breast-fed we could have breast-fed you could have breast-fed they could have breast-fed
V-ing perfect
I could have been breast-feeding you could have been breast-feeding he could have been breast-feeding we could have been breast-feeding you could have been breast-feeding they could have been breast-feeding
Negation
Simple form
I could not breast-feed you could not breast-feed he could not breast-feed we could not breast-feed you could not breast-feed they could not breast-feed
V-ing form
I could not be breast-feeding you could not be breast-feeding he could not be breast-feeding we could not be breast-feeding you could not be breast-feeding they could not be breast-feeding
Perfect
I could not have breast-fed you could not have breast-fed he could not have breast-fed we could not have breast-fed you could not have breast-fed they could not have breast-fed
V-ing perfect
I could not have been breast-feeding you could not have been breast-feeding he could not have been breast-feeding we could not have been breast-feeding you could not have been breast-feeding they could not have been breast-feeding
Interrogative form
Simple form
could I breast-feed? could you breast-feed? could he breast-feed? could we breast-feed? could you breast-feed? could they breast-feed?
V-ing form
could I be breast-feeding? could you be breast-feeding? could he be breast-feeding? could we be breast-feeding? could you be breast-feeding? could they be breast-feeding?
Perfect
could I have breast-fed? could you have breast-fed? could he have breast-fed? could we have breast-fed? could you have breast-fed? could they have breast-fed?
V-ing perfect
could I have been breast-feeding? could you have been breast-feeding? could he have been breast-feeding? could we have been breast-feeding? could you have been breast-feeding? could they have been breast-feeding?
Interro-negative form
Simple form
could I not breast-feed? could you not breast-feed? could he not breast-feed? could we not breast-feed? could you not breast-feed? could they not breast-feed?
V-ing form
could I not be breast-feeding? could you not be breast-feeding? could he not be breast-feeding? could we not be breast-feeding? could you not be breast-feeding? could they not be breast-feeding?
Perfect
could I not have breast-fed? could you not have breast-fed? could he not have breast-fed? could we not have breast-fed? could you not have breast-fed? could they not have breast-fed?
V-ing perfect
could I not have been breast-feeding? could you not have been breast-feeding? could he not have been breast-feeding? could we not have been breast-feeding? could you not have been breast-feeding? could they not have been breast-feeding?