I could receipt you could receipt she could receipt we could receipt you could receipt they could receipt
V-ing form
I could be receipting you could be receipting she could be receipting we could be receipting you could be receipting they could be receipting
Perfect
I could have receipted you could have receipted she could have receipted we could have receipted you could have receipted they could have receipted
V-ing perfect
I could have been receipting you could have been receipting she could have been receipting we could have been receipting you could have been receipting they could have been receipting
Negation
Simple form
I couldn't receipt you couldn't receipt she couldn't receipt we couldn't receipt you couldn't receipt they couldn't receipt
V-ing form
I couldn't be receipting you couldn't be receipting she couldn't be receipting we couldn't be receipting you couldn't be receipting they couldn't be receipting
Perfect
I couldn't have receipted you couldn't have receipted she couldn't have receipted we couldn't have receipted you couldn't have receipted they couldn't have receipted
V-ing perfect
I couldn't have been receipting you couldn't have been receipting she couldn't have been receipting we couldn't have been receipting you couldn't have been receipting they couldn't have been receipting
Interrogative form
Simple form
could I receipt? could you receipt? could she receipt? could we receipt? could you receipt? could they receipt?
V-ing form
could I be receipting? could you be receipting? could she be receipting? could we be receipting? could you be receipting? could they be receipting?
Perfect
could I have receipted? could you have receipted? could she have receipted? could we have receipted? could you have receipted? could they have receipted?
V-ing perfect
could I have been receipting? could you have been receipting? could she have been receipting? could we have been receipting? could you have been receipting? could they have been receipting?
Interro-negative form
Simple form
couldn't I receipt? couldn't you receipt? couldn't she receipt? couldn't we receipt? couldn't you receipt? couldn't they receipt?
V-ing form
couldn't I be receipting? couldn't you be receipting? couldn't she be receipting? couldn't we be receipting? couldn't you be receipting? couldn't they be receipting?
Perfect
couldn't I have receipted? couldn't you have receipted? couldn't she have receipted? couldn't we have receipted? couldn't you have receipted? couldn't they have receipted?
V-ing perfect
couldn't I have been receipting? couldn't you have been receipting? couldn't she have been receipting? couldn't we have been receipting? couldn't you have been receipting? couldn't they have been receipting?