I could register you could register she could register we could register you could register they could register
Form mit V-ing
I could be registering you could be registering she could be registering we could be registering you could be registering they could be registering
Perfekt
I could have registered you could have registered she could have registered we could have registered you could have registered they could have registered
Perfekt mit V-ing
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Negation
Einfache Form
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Form mit V-ing
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Perfekt
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Perfekt mit V-ing
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Fragende Form
Einfache Form
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Form mit V-ing
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Perfekt
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Perfekt mit V-ing
could I have been registering? could you have been registering? could she have been registering? could we have been registering? could you have been registering? could they have been registering?
Fragende Negation Form
Einfache Form
couldn't I register? couldn't you register? couldn't she register? couldn't we register? couldn't you register? couldn't they register?
Form mit V-ing
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Perfekt
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Perfekt mit V-ing
couldn't I have been registering? couldn't you have been registering? couldn't she have been registering? couldn't we have been registering? couldn't you have been registering? couldn't they have been registering?