I could lipread you could lipread he could lipread we could lipread you could lipread they could lipread
V-ing form
I could be lipreading you could be lipreading he could be lipreading we could be lipreading you could be lipreading they could be lipreading
Perfect
I could have lipread you could have lipread he could have lipread we could have lipread you could have lipread they could have lipread
V-ing perfect
I could have been lipreading you could have been lipreading he could have been lipreading we could have been lipreading you could have been lipreading they could have been lipreading
Negation
Simple form
I couldn't lipread you couldn't lipread he couldn't lipread we couldn't lipread you couldn't lipread they couldn't lipread
V-ing form
I couldn't be lipreading you couldn't be lipreading he couldn't be lipreading we couldn't be lipreading you couldn't be lipreading they couldn't be lipreading
Perfect
I couldn't have lipread you couldn't have lipread he couldn't have lipread we couldn't have lipread you couldn't have lipread they couldn't have lipread
V-ing perfect
I couldn't have been lipreading you couldn't have been lipreading he couldn't have been lipreading we couldn't have been lipreading you couldn't have been lipreading they couldn't have been lipreading
Interrogative form
Simple form
could I lipread? could you lipread? could he lipread? could we lipread? could you lipread? could they lipread?
V-ing form
could I be lipreading? could you be lipreading? could he be lipreading? could we be lipreading? could you be lipreading? could they be lipreading?
Perfect
could I have lipread? could you have lipread? could he have lipread? could we have lipread? could you have lipread? could they have lipread?
V-ing perfect
could I have been lipreading? could you have been lipreading? could he have been lipreading? could we have been lipreading? could you have been lipreading? could they have been lipreading?
Interro-negative form
Simple form
couldn't I lipread? couldn't you lipread? couldn't he lipread? couldn't we lipread? couldn't you lipread? couldn't they lipread?
V-ing form
couldn't I be lipreading? couldn't you be lipreading? couldn't he be lipreading? couldn't we be lipreading? couldn't you be lipreading? couldn't they be lipreading?
Perfect
couldn't I have lipread? couldn't you have lipread? couldn't he have lipread? couldn't we have lipread? couldn't you have lipread? couldn't they have lipread?
V-ing perfect
couldn't I have been lipreading? couldn't you have been lipreading? couldn't he have been lipreading? couldn't we have been lipreading? couldn't you have been lipreading? couldn't they have been lipreading?