I could metathesise you could metathesise he could metathesise we could metathesise you could metathesise they could metathesise
V-ing form
I could be metathesising you could be metathesising he could be metathesising we could be metathesising you could be metathesising they could be metathesising
Perfect
I could have metathesised you could have metathesised he could have metathesised we could have metathesised you could have metathesised they could have metathesised
V-ing perfect
I could have been metathesising you could have been metathesising he could have been metathesising we could have been metathesising you could have been metathesising they could have been metathesising
Negation
Simple form
I could not metathesise you could not metathesise he could not metathesise we could not metathesise you could not metathesise they could not metathesise
V-ing form
I could not be metathesising you could not be metathesising he could not be metathesising we could not be metathesising you could not be metathesising they could not be metathesising
Perfect
I could not have metathesised you could not have metathesised he could not have metathesised we could not have metathesised you could not have metathesised they could not have metathesised
V-ing perfect
I could not have been metathesising you could not have been metathesising he could not have been metathesising we could not have been metathesising you could not have been metathesising they could not have been metathesising
Interrogative form
Simple form
could I metathesise? could you metathesise? could he metathesise? could we metathesise? could you metathesise? could they metathesise?
V-ing form
could I be metathesising? could you be metathesising? could he be metathesising? could we be metathesising? could you be metathesising? could they be metathesising?
Perfect
could I have metathesised? could you have metathesised? could he have metathesised? could we have metathesised? could you have metathesised? could they have metathesised?
V-ing perfect
could I have been metathesising? could you have been metathesising? could he have been metathesising? could we have been metathesising? could you have been metathesising? could they have been metathesising?
Interro-negative form
Simple form
could I not metathesise? could you not metathesise? could he not metathesise? could we not metathesise? could you not metathesise? could they not metathesise?
V-ing form
could I not be metathesising? could you not be metathesising? could he not be metathesising? could we not be metathesising? could you not be metathesising? could they not be metathesising?
Perfect
could I not have metathesised? could you not have metathesised? could he not have metathesised? could we not have metathesised? could you not have metathesised? could they not have metathesised?
V-ing perfect
could I not have been metathesising? could you not have been metathesising? could he not have been metathesising? could we not have been metathesising? could you not have been metathesising? could they not have been metathesising?