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