I could scan you could scan she could scan we could scan you could scan they could scan
Forma com V-ing
I could be scanning you could be scanning she could be scanning we could be scanning you could be scanning they could be scanning
Perfeito
I could have scanned you could have scanned she could have scanned we could have scanned you could have scanned they could have scanned
Perfeito com V-ing
I could have been scanning you could have been scanning she could have been scanning we could have been scanning you could have been scanning they could have been scanning
Negação
Forma simple
I couldn't scan you couldn't scan she couldn't scan we couldn't scan you couldn't scan they couldn't scan
Forma com V-ing
I couldn't be scanning you couldn't be scanning she couldn't be scanning we couldn't be scanning you couldn't be scanning they couldn't be scanning
Perfeito
I couldn't have scanned you couldn't have scanned she couldn't have scanned we couldn't have scanned you couldn't have scanned they couldn't have scanned
Perfeito com V-ing
I couldn't have been scanning you couldn't have been scanning she couldn't have been scanning we couldn't have been scanning you couldn't have been scanning they couldn't have been scanning
Forma interrogativa
Forma simple
could I scan? could you scan? could she scan? could we scan? could you scan? could they scan?
Forma com V-ing
could I be scanning? could you be scanning? could she be scanning? could we be scanning? could you be scanning? could they be scanning?
Perfeito
could I have scanned? could you have scanned? could she have scanned? could we have scanned? could you have scanned? could they have scanned?
Perfeito com V-ing
could I have been scanning? could you have been scanning? could she have been scanning? could we have been scanning? could you have been scanning? could they have been scanning?
Forma interro-Negação
Forma simple
couldn't I scan? couldn't you scan? couldn't she scan? couldn't we scan? couldn't you scan? couldn't they scan?
Forma com V-ing
couldn't I be scanning? couldn't you be scanning? couldn't she be scanning? couldn't we be scanning? couldn't you be scanning? couldn't they be scanning?
Perfeito
couldn't I have scanned? couldn't you have scanned? couldn't she have scanned? couldn't we have scanned? couldn't you have scanned? couldn't they have scanned?
Perfeito com V-ing
couldn't I have been scanning? couldn't you have been scanning? couldn't she have been scanning? couldn't we have been scanning? couldn't you have been scanning? couldn't they have been scanning?