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