I could desalinate you could desalinate he could desalinate we could desalinate you could desalinate they could desalinate
V-ing form
I could be desalinating you could be desalinating he could be desalinating we could be desalinating you could be desalinating they could be desalinating
Perfect
I could have desalinated you could have desalinated he could have desalinated we could have desalinated you could have desalinated they could have desalinated
V-ing perfect
I could have been desalinating you could have been desalinating he could have been desalinating we could have been desalinating you could have been desalinating they could have been desalinating
Negation
Simple form
I couldn't desalinate you couldn't desalinate he couldn't desalinate we couldn't desalinate you couldn't desalinate they couldn't desalinate
V-ing form
I couldn't be desalinating you couldn't be desalinating he couldn't be desalinating we couldn't be desalinating you couldn't be desalinating they couldn't be desalinating
Perfect
I couldn't have desalinated you couldn't have desalinated he couldn't have desalinated we couldn't have desalinated you couldn't have desalinated they couldn't have desalinated
V-ing perfect
I couldn't have been desalinating you couldn't have been desalinating he couldn't have been desalinating we couldn't have been desalinating you couldn't have been desalinating they couldn't have been desalinating
Interrogative form
Simple form
could I desalinate? could you desalinate? could he desalinate? could we desalinate? could you desalinate? could they desalinate?
V-ing form
could I be desalinating? could you be desalinating? could he be desalinating? could we be desalinating? could you be desalinating? could they be desalinating?
Perfect
could I have desalinated? could you have desalinated? could he have desalinated? could we have desalinated? could you have desalinated? could they have desalinated?
V-ing perfect
could I have been desalinating? could you have been desalinating? could he have been desalinating? could we have been desalinating? could you have been desalinating? could they have been desalinating?
Interro-negative form
Simple form
couldn't I desalinate? couldn't you desalinate? couldn't he desalinate? couldn't we desalinate? couldn't you desalinate? couldn't they desalinate?
V-ing form
couldn't I be desalinating? couldn't you be desalinating? couldn't he be desalinating? couldn't we be desalinating? couldn't you be desalinating? couldn't they be desalinating?
Perfect
couldn't I have desalinated? couldn't you have desalinated? couldn't he have desalinated? couldn't we have desalinated? couldn't you have desalinated? couldn't they have desalinated?
V-ing perfect
couldn't I have been desalinating? couldn't you have been desalinating? couldn't he have been desalinating? couldn't we have been desalinating? couldn't you have been desalinating? couldn't they have been desalinating?