English verb conjugation
COULD METASTASISE

Regular verb: metastasise - metastasised - metastasised

Affirmation

Simple form	V-ing form
I could metastasise you could metastasise she could metastasise we could metastasise you could metastasise they could metastasise	I could be metastasising you could be metastasising she could be metastasising we could be metastasising you could be metastasising they could be metastasising
Perfect	V-ing perfect
I could have metastasised you could have metastasised she could have metastasised we could have metastasised you could have metastasised they could have metastasised	I could have been metastasising you could have been metastasising she could have been metastasising we could have been metastasising you could have been metastasising they could have been metastasising

Negation

Simple form	V-ing form
I couldn't metastasise you couldn't metastasise she couldn't metastasise we couldn't metastasise you couldn't metastasise they couldn't metastasise	I couldn't be metastasising you couldn't be metastasising she couldn't be metastasising we couldn't be metastasising you couldn't be metastasising they couldn't be metastasising
Perfect	V-ing perfect
I couldn't have metastasised you couldn't have metastasised she couldn't have metastasised we couldn't have metastasised you couldn't have metastasised they couldn't have metastasised	I couldn't have been metastasising you couldn't have been metastasising she couldn't have been metastasising we couldn't have been metastasising you couldn't have been metastasising they couldn't have been metastasising

Interrogative form

Simple form	V-ing form
could I metastasise? could you metastasise? could she metastasise? could we metastasise? could you metastasise? could they metastasise?	could I be metastasising? could you be metastasising? could she be metastasising? could we be metastasising? could you be metastasising? could they be metastasising?
Perfect	V-ing perfect
could I have metastasised? could you have metastasised? could she have metastasised? could we have metastasised? could you have metastasised? could they have metastasised?	could I have been metastasising? could you have been metastasising? could she have been metastasising? could we have been metastasising? could you have been metastasising? could they have been metastasising?

Interro-negative form

Simple form	V-ing form
couldn't I metastasise? couldn't you metastasise? couldn't she metastasise? couldn't we metastasise? couldn't you metastasise? couldn't they metastasise?	couldn't I be metastasising? couldn't you be metastasising? couldn't she be metastasising? couldn't we be metastasising? couldn't you be metastasising? couldn't they be metastasising?
Perfect	V-ing perfect
couldn't I have metastasised? couldn't you have metastasised? couldn't she have metastasised? couldn't we have metastasised? couldn't you have metastasised? couldn't they have metastasised?	couldn't I have been metastasising? couldn't you have been metastasising? couldn't she have been metastasising? couldn't we have been metastasising? couldn't you have been metastasising? couldn't they have been metastasising?