I could author you could author he could author we could author you could author they could author
Form mit V-ing
I could be authoring you could be authoring he could be authoring we could be authoring you could be authoring they could be authoring
Perfekt
I could have authored you could have authored he could have authored we could have authored you could have authored they could have authored
Perfekt mit V-ing
I could have been authoring you could have been authoring he could have been authoring we could have been authoring you could have been authoring they could have been authoring
Negation
Einfache Form
I couldn't author you couldn't author he couldn't author we couldn't author you couldn't author they couldn't author
Form mit V-ing
I couldn't be authoring you couldn't be authoring he couldn't be authoring we couldn't be authoring you couldn't be authoring they couldn't be authoring
Perfekt
I couldn't have authored you couldn't have authored he couldn't have authored we couldn't have authored you couldn't have authored they couldn't have authored
Perfekt mit V-ing
I couldn't have been authoring you couldn't have been authoring he couldn't have been authoring we couldn't have been authoring you couldn't have been authoring they couldn't have been authoring
Fragende Form
Einfache Form
could I author? could you author? could he author? could we author? could you author? could they author?
Form mit V-ing
could I be authoring? could you be authoring? could he be authoring? could we be authoring? could you be authoring? could they be authoring?
Perfekt
could I have authored? could you have authored? could he have authored? could we have authored? could you have authored? could they have authored?
Perfekt mit V-ing
could I have been authoring? could you have been authoring? could he have been authoring? could we have been authoring? could you have been authoring? could they have been authoring?
Fragende Negation Form
Einfache Form
couldn't I author? couldn't you author? couldn't he author? couldn't we author? couldn't you author? couldn't they author?
Form mit V-ing
couldn't I be authoring? couldn't you be authoring? couldn't he be authoring? couldn't we be authoring? couldn't you be authoring? couldn't they be authoring?
Perfekt
couldn't I have authored? couldn't you have authored? couldn't he have authored? couldn't we have authored? couldn't you have authored? couldn't they have authored?
Perfekt mit V-ing
couldn't I have been authoring? couldn't you have been authoring? couldn't he have been authoring? couldn't we have been authoring? couldn't you have been authoring? couldn't they have been authoring?