I can breast-feed you can breast-feed she can breast-feed we can breast-feed you can breast-feed they can breast-feed
V-ing form
I can be breast-feeding you can be breast-feeding she can be breast-feeding we can be breast-feeding you can be breast-feeding they can be breast-feeding
Perfect
I can have breast-fed you can have breast-fed she can have breast-fed we can have breast-fed you can have breast-fed they can have breast-fed
V-ing perfect
I can have been breast-feeding you can have been breast-feeding she can have been breast-feeding we can have been breast-feeding you can have been breast-feeding they can have been breast-feeding
Negation
Simple form
I can't breast-feed you can't breast-feed she can't breast-feed we can't breast-feed you can't breast-feed they can't breast-feed
V-ing form
I can't be breast-feeding you can't be breast-feeding she can't be breast-feeding we can't be breast-feeding you can't be breast-feeding they can't be breast-feeding
Perfect
I can't have breast-fed you can't have breast-fed she can't have breast-fed we can't have breast-fed you can't have breast-fed they can't have breast-fed
V-ing perfect
I can't have been breast-feeding you can't have been breast-feeding she can't have been breast-feeding we can't have been breast-feeding you can't have been breast-feeding they can't have been breast-feeding
Interrogative form
Simple form
can I breast-feed? can you breast-feed? can she breast-feed? can we breast-feed? can you breast-feed? can they breast-feed?
V-ing form
can I be breast-feeding? can you be breast-feeding? can she be breast-feeding? can we be breast-feeding? can you be breast-feeding? can they be breast-feeding?
Perfect
can I have breast-fed? can you have breast-fed? can she have breast-fed? can we have breast-fed? can you have breast-fed? can they have breast-fed?
V-ing perfect
can I have been breast-feeding? can you have been breast-feeding? can she have been breast-feeding? can we have been breast-feeding? can you have been breast-feeding? can they have been breast-feeding?
Interro-negative form
Simple form
can't I breast-feed? can't you breast-feed? can't she breast-feed? can't we breast-feed? can't you breast-feed? can't they breast-feed?
V-ing form
can't I be breast-feeding? can't you be breast-feeding? can't she be breast-feeding? can't we be breast-feeding? can't you be breast-feeding? can't they be breast-feeding?
Perfect
can't I have breast-fed? can't you have breast-fed? can't she have breast-fed? can't we have breast-fed? can't you have breast-fed? can't they have breast-fed?
V-ing perfect
can't I have been breast-feeding? can't you have been breast-feeding? can't she have been breast-feeding? can't we have been breast-feeding? can't you have been breast-feeding? can't they have been breast-feeding?