I could diazotise you could diazotise he could diazotise we could diazotise you could diazotise they could diazotise
V-ing form
I could be diazotising you could be diazotising he could be diazotising we could be diazotising you could be diazotising they could be diazotising
Perfect
I could have diazotised you could have diazotised he could have diazotised we could have diazotised you could have diazotised they could have diazotised
V-ing perfect
I could have been diazotising you could have been diazotising he could have been diazotising we could have been diazotising you could have been diazotising they could have been diazotising
Negation
Simple form
I could not diazotise you could not diazotise he could not diazotise we could not diazotise you could not diazotise they could not diazotise
V-ing form
I could not be diazotising you could not be diazotising he could not be diazotising we could not be diazotising you could not be diazotising they could not be diazotising
Perfect
I could not have diazotised you could not have diazotised he could not have diazotised we could not have diazotised you could not have diazotised they could not have diazotised
V-ing perfect
I could not have been diazotising you could not have been diazotising he could not have been diazotising we could not have been diazotising you could not have been diazotising they could not have been diazotising
Interrogative form
Simple form
could I diazotise? could you diazotise? could he diazotise? could we diazotise? could you diazotise? could they diazotise?
V-ing form
could I be diazotising? could you be diazotising? could he be diazotising? could we be diazotising? could you be diazotising? could they be diazotising?
Perfect
could I have diazotised? could you have diazotised? could he have diazotised? could we have diazotised? could you have diazotised? could they have diazotised?
V-ing perfect
could I have been diazotising? could you have been diazotising? could he have been diazotising? could we have been diazotising? could you have been diazotising? could they have been diazotising?
Interro-negative form
Simple form
could I not diazotise? could you not diazotise? could he not diazotise? could we not diazotise? could you not diazotise? could they not diazotise?
V-ing form
could I not be diazotising? could you not be diazotising? could he not be diazotising? could we not be diazotising? could you not be diazotising? could they not be diazotising?
Perfect
could I not have diazotised? could you not have diazotised? could he not have diazotised? could we not have diazotised? could you not have diazotised? could they not have diazotised?
V-ing perfect
could I not have been diazotising? could you not have been diazotising? could he not have been diazotising? could we not have been diazotising? could you not have been diazotising? could they not have been diazotising?