I could receipt you could receipt he could receipt we could receipt you could receipt they could receipt
V-ing form
I could be receipting you could be receipting he could be receipting we could be receipting you could be receipting they could be receipting
Perfect
I could have receipted you could have receipted he 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 he 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 he 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 he 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 he 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 he 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 he receipt? could we receipt? could you receipt? could they receipt?
V-ing form
could I be receipting? could you be receipting? could he be receipting? could we be receipting? could you be receipting? could they be receipting?
Perfect
could I have receipted? could you have receipted? could he 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 he 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 he 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 he 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 he 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 he have been receipting? couldn't we have been receipting? couldn't you have been receipting? couldn't they have been receipting?