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