I could apostrophise you could apostrophise she could apostrophise we could apostrophise you could apostrophise they could apostrophise
V-ing form
I could be apostrophising you could be apostrophising she could be apostrophising we could be apostrophising you could be apostrophising they could be apostrophising
Perfect
I could have apostrophised you could have apostrophised she could have apostrophised we could have apostrophised you could have apostrophised they could have apostrophised
V-ing perfect
I could have been apostrophising you could have been apostrophising she could have been apostrophising we could have been apostrophising you could have been apostrophising they could have been apostrophising
Negation
Simple form
I could not apostrophise you could not apostrophise she could not apostrophise we could not apostrophise you could not apostrophise they could not apostrophise
V-ing form
I could not be apostrophising you could not be apostrophising she could not be apostrophising we could not be apostrophising you could not be apostrophising they could not be apostrophising
Perfect
I could not have apostrophised you could not have apostrophised she could not have apostrophised we could not have apostrophised you could not have apostrophised they could not have apostrophised
V-ing perfect
I could not have been apostrophising you could not have been apostrophising she could not have been apostrophising we could not have been apostrophising you could not have been apostrophising they could not have been apostrophising
Interrogative form
Simple form
could I apostrophise? could you apostrophise? could she apostrophise? could we apostrophise? could you apostrophise? could they apostrophise?
V-ing form
could I be apostrophising? could you be apostrophising? could she be apostrophising? could we be apostrophising? could you be apostrophising? could they be apostrophising?
Perfect
could I have apostrophised? could you have apostrophised? could she have apostrophised? could we have apostrophised? could you have apostrophised? could they have apostrophised?
V-ing perfect
could I have been apostrophising? could you have been apostrophising? could she have been apostrophising? could we have been apostrophising? could you have been apostrophising? could they have been apostrophising?
Interro-negative form
Simple form
could I not apostrophise? could you not apostrophise? could she not apostrophise? could we not apostrophise? could you not apostrophise? could they not apostrophise?
V-ing form
could I not be apostrophising? could you not be apostrophising? could she not be apostrophising? could we not be apostrophising? could you not be apostrophising? could they not be apostrophising?
Perfect
could I not have apostrophised? could you not have apostrophised? could she not have apostrophised? could we not have apostrophised? could you not have apostrophised? could they not have apostrophised?
V-ing perfect
could I not have been apostrophising? could you not have been apostrophising? could she not have been apostrophising? could we not have been apostrophising? could you not have been apostrophising? could they not have been apostrophising?