English verb conjugation
COULD METATHESISE

Regular verb: metathesise - metathesised - metathesised

Affirmation

Simple form	V-ing form
I could metathesise you could metathesise she could metathesise we could metathesise you could metathesise they could metathesise	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	V-ing 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	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	V-ing 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	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	V-ing 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	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	V-ing form
could I metathesise? could you metathesise? could she metathesise? could we metathesise? could you metathesise? could they metathesise?	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	V-ing 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?	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	V-ing 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?	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	V-ing 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?	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?