I could metathesise you could metathesise she could metathesise we could metathesise you could metathesise they could metathesise
V-ing form
I could be metathesising you could be metathesising she could be metathesising we could be metathesising you could be metathesising they could be metathesising
Perfect
I could have metathesised you could have metathesised she 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 she could have been metathesising we could have been metathesising you could have been metathesising they could have been metathesising
Negation
Simple form
I couldn't metathesise you couldn't metathesise she couldn't metathesise we couldn't metathesise you couldn't metathesise they couldn't metathesise
V-ing form
I couldn't be metathesising you couldn't be metathesising she couldn't be metathesising we couldn't be metathesising you couldn't be metathesising they couldn't be metathesising
Perfect
I couldn't have metathesised you couldn't have metathesised she couldn't have metathesised we couldn't have metathesised you couldn't have metathesised they couldn't have metathesised
V-ing perfect
I couldn't have been metathesising you couldn't have been metathesising she couldn't have been metathesising we couldn't have been metathesising you couldn't have been metathesising they couldn't have been metathesising
Interrogative form
Simple form
could I metathesise? could you metathesise? could she metathesise? could we metathesise? could you metathesise? could they metathesise?
V-ing form
could I be metathesising? could you be metathesising? could she be metathesising? could we be metathesising? could you be metathesising? could they be metathesising?
Perfect
could I have metathesised? could you have metathesised? could she 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 she have been metathesising? could we have been metathesising? could you have been metathesising? could they have been metathesising?
Interro-negative form
Simple form
couldn't I metathesise? couldn't you metathesise? couldn't she metathesise? couldn't we metathesise? couldn't you metathesise? couldn't they metathesise?
V-ing form
couldn't I be metathesising? couldn't you be metathesising? couldn't she be metathesising? couldn't we be metathesising? couldn't you be metathesising? couldn't they be metathesising?
Perfect
couldn't I have metathesised? couldn't you have metathesised? couldn't she have metathesised? couldn't we have metathesised? couldn't you have metathesised? couldn't they have metathesised?
V-ing perfect
couldn't I have been metathesising? couldn't you have been metathesising? couldn't she have been metathesising? couldn't we have been metathesising? couldn't you have been metathesising? couldn't they have been metathesising?