English verb conjugation
COULD METATHESIZE

Regular verb: metathesize - metathesized - metathesized

Affirmation

Simple form	V-ing form
I could metathesize you could metathesize he could metathesize we could metathesize you could metathesize they could metathesize	I could be metathesizing you could be metathesizing he could be metathesizing we could be metathesizing you could be metathesizing they could be metathesizing
Perfect	V-ing perfect
I could have metathesized you could have metathesized he could have metathesized we could have metathesized you could have metathesized they could have metathesized	I could have been metathesizing you could have been metathesizing he could have been metathesizing we could have been metathesizing you could have been metathesizing they could have been metathesizing

Negation

Simple form	V-ing form
I couldn't metathesize you couldn't metathesize he couldn't metathesize we couldn't metathesize you couldn't metathesize they couldn't metathesize	I couldn't be metathesizing you couldn't be metathesizing he couldn't be metathesizing we couldn't be metathesizing you couldn't be metathesizing they couldn't be metathesizing
Perfect	V-ing perfect
I couldn't have metathesized you couldn't have metathesized he couldn't have metathesized we couldn't have metathesized you couldn't have metathesized they couldn't have metathesized	I couldn't have been metathesizing you couldn't have been metathesizing he couldn't have been metathesizing we couldn't have been metathesizing you couldn't have been metathesizing they couldn't have been metathesizing

Interrogative form

Simple form	V-ing form
could I metathesize? could you metathesize? could he metathesize? could we metathesize? could you metathesize? could they metathesize?	could I be metathesizing? could you be metathesizing? could he be metathesizing? could we be metathesizing? could you be metathesizing? could they be metathesizing?
Perfect	V-ing perfect
could I have metathesized? could you have metathesized? could he have metathesized? could we have metathesized? could you have metathesized? could they have metathesized?	could I have been metathesizing? could you have been metathesizing? could he have been metathesizing? could we have been metathesizing? could you have been metathesizing? could they have been metathesizing?

Interro-negative form

Simple form	V-ing form
couldn't I metathesize? couldn't you metathesize? couldn't he metathesize? couldn't we metathesize? couldn't you metathesize? couldn't they metathesize?	couldn't I be metathesizing? couldn't you be metathesizing? couldn't he be metathesizing? couldn't we be metathesizing? couldn't you be metathesizing? couldn't they be metathesizing?
Perfect	V-ing perfect
couldn't I have metathesized? couldn't you have metathesized? couldn't he have metathesized? couldn't we have metathesized? couldn't you have metathesized? couldn't they have metathesized?	couldn't I have been metathesizing? couldn't you have been metathesizing? couldn't he have been metathesizing? couldn't we have been metathesizing? couldn't you have been metathesizing? couldn't they have been metathesizing?