I could check you could check he could check we could check you could check they could check
Form mit V-ing
I could be checking you could be checking he could be checking we could be checking you could be checking they could be checking
Perfekt
I could have checked you could have checked he could have checked we could have checked you could have checked they could have checked
Perfekt mit V-ing
I could have been checking you could have been checking he could have been checking we could have been checking you could have been checking they could have been checking
Negation
Einfache Form
I couldn't check you couldn't check he couldn't check we couldn't check you couldn't check they couldn't check
Form mit V-ing
I couldn't be checking you couldn't be checking he couldn't be checking we couldn't be checking you couldn't be checking they couldn't be checking
Perfekt
I couldn't have checked you couldn't have checked he couldn't have checked we couldn't have checked you couldn't have checked they couldn't have checked
Perfekt mit V-ing
I couldn't have been checking you couldn't have been checking he couldn't have been checking we couldn't have been checking you couldn't have been checking they couldn't have been checking
Fragende Form
Einfache Form
could I check? could you check? could he check? could we check? could you check? could they check?
Form mit V-ing
could I be checking? could you be checking? could he be checking? could we be checking? could you be checking? could they be checking?
Perfekt
could I have checked? could you have checked? could he have checked? could we have checked? could you have checked? could they have checked?
Perfekt mit V-ing
could I have been checking? could you have been checking? could he have been checking? could we have been checking? could you have been checking? could they have been checking?
Fragende Negation Form
Einfache Form
couldn't I check? couldn't you check? couldn't he check? couldn't we check? couldn't you check? couldn't they check?
Form mit V-ing
couldn't I be checking? couldn't you be checking? couldn't he be checking? couldn't we be checking? couldn't you be checking? couldn't they be checking?
Perfekt
couldn't I have checked? couldn't you have checked? couldn't he have checked? couldn't we have checked? couldn't you have checked? couldn't they have checked?
Perfekt mit V-ing
couldn't I have been checking? couldn't you have been checking? couldn't he have been checking? couldn't we have been checking? couldn't you have been checking? couldn't they have been checking?