I could slide you could slide he could slide we could slide you could slide they could slide
Forma con V-ing
I could be sliding you could be sliding he could be sliding we could be sliding you could be sliding they could be sliding
Perfecto
I could have slid you could have slid he could have slid we could have slid you could have slid they could have slid
Perfecto con V-ing
I could have been sliding you could have been sliding he could have been sliding we could have been sliding you could have been sliding they could have been sliding
Negación
Forma simple
I couldn't slide you couldn't slide he couldn't slide we couldn't slide you couldn't slide they couldn't slide
Forma con V-ing
I couldn't be sliding you couldn't be sliding he couldn't be sliding we couldn't be sliding you couldn't be sliding they couldn't be sliding
Perfecto
I couldn't have slid you couldn't have slid he couldn't have slid we couldn't have slid you couldn't have slid they couldn't have slid
Perfecto con V-ing
I couldn't have been sliding you couldn't have been sliding he couldn't have been sliding we couldn't have been sliding you couldn't have been sliding they couldn't have been sliding
Forma interrogativa
Forma simple
could I slide? could you slide? could he slide? could we slide? could you slide? could they slide?
Forma con V-ing
could I be sliding? could you be sliding? could he be sliding? could we be sliding? could you be sliding? could they be sliding?
Perfecto
could I have slid? could you have slid? could he have slid? could we have slid? could you have slid? could they have slid?
Perfecto con V-ing
could I have been sliding? could you have been sliding? could he have been sliding? could we have been sliding? could you have been sliding? could they have been sliding?
Forma interro-negativa
Forma simple
couldn't I slide? couldn't you slide? couldn't he slide? couldn't we slide? couldn't you slide? couldn't they slide?
Forma con V-ing
couldn't I be sliding? couldn't you be sliding? couldn't he be sliding? couldn't we be sliding? couldn't you be sliding? couldn't they be sliding?
Perfecto
couldn't I have slid? couldn't you have slid? couldn't he have slid? couldn't we have slid? couldn't you have slid? couldn't they have slid?
Perfecto con V-ing
couldn't I have been sliding? couldn't you have been sliding? couldn't he have been sliding? couldn't we have been sliding? couldn't you have been sliding? couldn't they have been sliding?