I could botanise you could botanise he could botanise we could botanise you could botanise they could botanise
V-ing form
I could be botanising you could be botanising he could be botanising we could be botanising you could be botanising they could be botanising
Perfect
I could have botanised you could have botanised he could have botanised we could have botanised you could have botanised they could have botanised
V-ing perfect
I could have been botanising you could have been botanising he could have been botanising we could have been botanising you could have been botanising they could have been botanising
Negation
Simple form
I could not botanise you could not botanise he could not botanise we could not botanise you could not botanise they could not botanise
V-ing form
I could not be botanising you could not be botanising he could not be botanising we could not be botanising you could not be botanising they could not be botanising
Perfect
I could not have botanised you could not have botanised he could not have botanised we could not have botanised you could not have botanised they could not have botanised
V-ing perfect
I could not have been botanising you could not have been botanising he could not have been botanising we could not have been botanising you could not have been botanising they could not have been botanising
Interrogative form
Simple form
could I botanise? could you botanise? could he botanise? could we botanise? could you botanise? could they botanise?
V-ing form
could I be botanising? could you be botanising? could he be botanising? could we be botanising? could you be botanising? could they be botanising?
Perfect
could I have botanised? could you have botanised? could he have botanised? could we have botanised? could you have botanised? could they have botanised?
V-ing perfect
could I have been botanising? could you have been botanising? could he have been botanising? could we have been botanising? could you have been botanising? could they have been botanising?
Interro-negative form
Simple form
could I not botanise? could you not botanise? could he not botanise? could we not botanise? could you not botanise? could they not botanise?
V-ing form
could I not be botanising? could you not be botanising? could he not be botanising? could we not be botanising? could you not be botanising? could they not be botanising?
Perfect
could I not have botanised? could you not have botanised? could he not have botanised? could we not have botanised? could you not have botanised? could they not have botanised?
V-ing perfect
could I not have been botanising? could you not have been botanising? could he not have been botanising? could we not have been botanising? could you not have been botanising? could they not have been botanising?