I could substitute you could substitute he could substitute we could substitute you could substitute they could substitute
Form mit V-ing
I could be substituting you could be substituting he could be substituting we could be substituting you could be substituting they could be substituting
Perfekt
I could have substituted you could have substituted he could have substituted we could have substituted you could have substituted they could have substituted
Perfekt mit V-ing
I could have been substituting you could have been substituting he could have been substituting we could have been substituting you could have been substituting they could have been substituting
Negation
Einfache Form
I couldn't substitute you couldn't substitute he couldn't substitute we couldn't substitute you couldn't substitute they couldn't substitute
Form mit V-ing
I couldn't be substituting you couldn't be substituting he couldn't be substituting we couldn't be substituting you couldn't be substituting they couldn't be substituting
Perfekt
I couldn't have substituted you couldn't have substituted he couldn't have substituted we couldn't have substituted you couldn't have substituted they couldn't have substituted
Perfekt mit V-ing
I couldn't have been substituting you couldn't have been substituting he couldn't have been substituting we couldn't have been substituting you couldn't have been substituting they couldn't have been substituting
Fragende Form
Einfache Form
could I substitute? could you substitute? could he substitute? could we substitute? could you substitute? could they substitute?
Form mit V-ing
could I be substituting? could you be substituting? could he be substituting? could we be substituting? could you be substituting? could they be substituting?
Perfekt
could I have substituted? could you have substituted? could he have substituted? could we have substituted? could you have substituted? could they have substituted?
Perfekt mit V-ing
could I have been substituting? could you have been substituting? could he have been substituting? could we have been substituting? could you have been substituting? could they have been substituting?
Fragende Negation Form
Einfache Form
couldn't I substitute? couldn't you substitute? couldn't he substitute? couldn't we substitute? couldn't you substitute? couldn't they substitute?
Form mit V-ing
couldn't I be substituting? couldn't you be substituting? couldn't he be substituting? couldn't we be substituting? couldn't you be substituting? couldn't they be substituting?
Perfekt
couldn't I have substituted? couldn't you have substituted? couldn't he have substituted? couldn't we have substituted? couldn't you have substituted? couldn't they have substituted?
Perfekt mit V-ing
couldn't I have been substituting? couldn't you have been substituting? couldn't he have been substituting? couldn't we have been substituting? couldn't you have been substituting? couldn't they have been substituting?