I could decarbonate you could decarbonate he could decarbonate we could decarbonate you could decarbonate they could decarbonate
V-ing form
I could be decarbonating you could be decarbonating he could be decarbonating we could be decarbonating you could be decarbonating they could be decarbonating
Perfect
I could have decarbonated you could have decarbonated he could have decarbonated we could have decarbonated you could have decarbonated they could have decarbonated
V-ing perfect
I could have been decarbonating you could have been decarbonating he could have been decarbonating we could have been decarbonating you could have been decarbonating they could have been decarbonating
Negation
Simple form
I could not decarbonate you could not decarbonate he could not decarbonate we could not decarbonate you could not decarbonate they could not decarbonate
V-ing form
I could not be decarbonating you could not be decarbonating he could not be decarbonating we could not be decarbonating you could not be decarbonating they could not be decarbonating
Perfect
I could not have decarbonated you could not have decarbonated he could not have decarbonated we could not have decarbonated you could not have decarbonated they could not have decarbonated
V-ing perfect
I could not have been decarbonating you could not have been decarbonating he could not have been decarbonating we could not have been decarbonating you could not have been decarbonating they could not have been decarbonating
Interrogative form
Simple form
could I decarbonate? could you decarbonate? could he decarbonate? could we decarbonate? could you decarbonate? could they decarbonate?
V-ing form
could I be decarbonating? could you be decarbonating? could he be decarbonating? could we be decarbonating? could you be decarbonating? could they be decarbonating?
Perfect
could I have decarbonated? could you have decarbonated? could he have decarbonated? could we have decarbonated? could you have decarbonated? could they have decarbonated?
V-ing perfect
could I have been decarbonating? could you have been decarbonating? could he have been decarbonating? could we have been decarbonating? could you have been decarbonating? could they have been decarbonating?
Interro-negative form
Simple form
could I not decarbonate? could you not decarbonate? could he not decarbonate? could we not decarbonate? could you not decarbonate? could they not decarbonate?
V-ing form
could I not be decarbonating? could you not be decarbonating? could he not be decarbonating? could we not be decarbonating? could you not be decarbonating? could they not be decarbonating?
Perfect
could I not have decarbonated? could you not have decarbonated? could he not have decarbonated? could we not have decarbonated? could you not have decarbonated? could they not have decarbonated?
V-ing perfect
could I not have been decarbonating? could you not have been decarbonating? could he not have been decarbonating? could we not have been decarbonating? could you not have been decarbonating? could they not have been decarbonating?