I can feast you can feast she can feast we can feast you can feast they can feast
V-ing form
I can be feasting you can be feasting she can be feasting we can be feasting you can be feasting they can be feasting
Perfect
I can have feasted you can have feasted she can have feasted we can have feasted you can have feasted they can have feasted
V-ing perfect
I can have been feasting you can have been feasting she can have been feasting we can have been feasting you can have been feasting they can have been feasting
Negation
Simple form
I can't feast you can't feast she can't feast we can't feast you can't feast they can't feast
V-ing form
I can't be feasting you can't be feasting she can't be feasting we can't be feasting you can't be feasting they can't be feasting
Perfect
I can't have feasted you can't have feasted she can't have feasted we can't have feasted you can't have feasted they can't have feasted
V-ing perfect
I can't have been feasting you can't have been feasting she can't have been feasting we can't have been feasting you can't have been feasting they can't have been feasting
Interrogative form
Simple form
can I feast? can you feast? can she feast? can we feast? can you feast? can they feast?
V-ing form
can I be feasting? can you be feasting? can she be feasting? can we be feasting? can you be feasting? can they be feasting?
Perfect
can I have feasted? can you have feasted? can she have feasted? can we have feasted? can you have feasted? can they have feasted?
V-ing perfect
can I have been feasting? can you have been feasting? can she have been feasting? can we have been feasting? can you have been feasting? can they have been feasting?
Interro-negative form
Simple form
can't I feast? can't you feast? can't she feast? can't we feast? can't you feast? can't they feast?
V-ing form
can't I be feasting? can't you be feasting? can't she be feasting? can't we be feasting? can't you be feasting? can't they be feasting?
Perfect
can't I have feasted? can't you have feasted? can't she have feasted? can't we have feasted? can't you have feasted? can't they have feasted?
V-ing perfect
can't I have been feasting? can't you have been feasting? can't she have been feasting? can't we have been feasting? can't you have been feasting? can't they have been feasting?