Cuidado, este verbo pode não existir, a conjugação é dada como exemplo.
Afirmação
Forma simple
I could sniffer you could sniffer she could sniffer we could sniffer you could sniffer they could sniffer
Forma com V-ing
I could be sniffering you could be sniffering she could be sniffering we could be sniffering you could be sniffering they could be sniffering
Perfeito
I could have sniffered you could have sniffered she could have sniffered we could have sniffered you could have sniffered they could have sniffered
Perfeito com V-ing
I could have been sniffering you could have been sniffering she could have been sniffering we could have been sniffering you could have been sniffering they could have been sniffering
Negação
Forma simple
I couldn't sniffer you couldn't sniffer she couldn't sniffer we couldn't sniffer you couldn't sniffer they couldn't sniffer
Forma com V-ing
I couldn't be sniffering you couldn't be sniffering she couldn't be sniffering we couldn't be sniffering you couldn't be sniffering they couldn't be sniffering
Perfeito
I couldn't have sniffered you couldn't have sniffered she couldn't have sniffered we couldn't have sniffered you couldn't have sniffered they couldn't have sniffered
Perfeito com V-ing
I couldn't have been sniffering you couldn't have been sniffering she couldn't have been sniffering we couldn't have been sniffering you couldn't have been sniffering they couldn't have been sniffering
Forma interrogativa
Forma simple
could I sniffer? could you sniffer? could she sniffer? could we sniffer? could you sniffer? could they sniffer?
Forma com V-ing
could I be sniffering? could you be sniffering? could she be sniffering? could we be sniffering? could you be sniffering? could they be sniffering?
Perfeito
could I have sniffered? could you have sniffered? could she have sniffered? could we have sniffered? could you have sniffered? could they have sniffered?
Perfeito com V-ing
could I have been sniffering? could you have been sniffering? could she have been sniffering? could we have been sniffering? could you have been sniffering? could they have been sniffering?
Forma interro-Negação
Forma simple
couldn't I sniffer? couldn't you sniffer? couldn't she sniffer? couldn't we sniffer? couldn't you sniffer? couldn't they sniffer?
Forma com V-ing
couldn't I be sniffering? couldn't you be sniffering? couldn't she be sniffering? couldn't we be sniffering? couldn't you be sniffering? couldn't they be sniffering?
Perfeito
couldn't I have sniffered? couldn't you have sniffered? couldn't she have sniffered? couldn't we have sniffered? couldn't you have sniffered? couldn't they have sniffered?
Perfeito com V-ing
couldn't I have been sniffering? couldn't you have been sniffering? couldn't she have been sniffering? couldn't we have been sniffering? couldn't you have been sniffering? couldn't they have been sniffering?