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