I could clean you could clean she could clean we could clean you could clean they could clean
Forma con V-ing
I could be cleaning you could be cleaning she could be cleaning we could be cleaning you could be cleaning they could be cleaning
Perfecto
I could have cleaned you could have cleaned she could have cleaned we could have cleaned you could have cleaned they could have cleaned
Perfecto con V-ing
I could have been cleaning you could have been cleaning she could have been cleaning we could have been cleaning you could have been cleaning they could have been cleaning
Negación
Forma simple
I couldn't clean you couldn't clean she couldn't clean we couldn't clean you couldn't clean they couldn't clean
Forma con V-ing
I couldn't be cleaning you couldn't be cleaning she couldn't be cleaning we couldn't be cleaning you couldn't be cleaning they couldn't be cleaning
Perfecto
I couldn't have cleaned you couldn't have cleaned she couldn't have cleaned we couldn't have cleaned you couldn't have cleaned they couldn't have cleaned
Perfecto con V-ing
I couldn't have been cleaning you couldn't have been cleaning she couldn't have been cleaning we couldn't have been cleaning you couldn't have been cleaning they couldn't have been cleaning
Forma interrogativa
Forma simple
could I clean? could you clean? could she clean? could we clean? could you clean? could they clean?
Forma con V-ing
could I be cleaning? could you be cleaning? could she be cleaning? could we be cleaning? could you be cleaning? could they be cleaning?
Perfecto
could I have cleaned? could you have cleaned? could she have cleaned? could we have cleaned? could you have cleaned? could they have cleaned?
Perfecto con V-ing
could I have been cleaning? could you have been cleaning? could she have been cleaning? could we have been cleaning? could you have been cleaning? could they have been cleaning?
Forma interro-negativa
Forma simple
couldn't I clean? couldn't you clean? couldn't she clean? couldn't we clean? couldn't you clean? couldn't they clean?
Forma con V-ing
couldn't I be cleaning? couldn't you be cleaning? couldn't she be cleaning? couldn't we be cleaning? couldn't you be cleaning? couldn't they be cleaning?
Perfecto
couldn't I have cleaned? couldn't you have cleaned? couldn't she have cleaned? couldn't we have cleaned? couldn't you have cleaned? couldn't they have cleaned?
Perfecto con V-ing
couldn't I have been cleaning? couldn't you have been cleaning? couldn't she have been cleaning? couldn't we have been cleaning? couldn't you have been cleaning? couldn't they have been cleaning?