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