English verb conjugation
COULD METASTASIZE

Regular verb: metastasize - metastasized - metastasized

Affirmation

Simple form	V-ing form
I could metastasize you could metastasize he could metastasize we could metastasize you could metastasize they could metastasize	I could be metastasizing you could be metastasizing he could be metastasizing we could be metastasizing you could be metastasizing they could be metastasizing
Perfect	V-ing perfect
I could have metastasized you could have metastasized he could have metastasized we could have metastasized you could have metastasized they could have metastasized	I could have been metastasizing you could have been metastasizing he could have been metastasizing we could have been metastasizing you could have been metastasizing they could have been metastasizing

Negation

Simple form	V-ing form
I could not metastasize you could not metastasize he could not metastasize we could not metastasize you could not metastasize they could not metastasize	I could not be metastasizing you could not be metastasizing he could not be metastasizing we could not be metastasizing you could not be metastasizing they could not be metastasizing
Perfect	V-ing perfect
I could not have metastasized you could not have metastasized he could not have metastasized we could not have metastasized you could not have metastasized they could not have metastasized	I could not have been metastasizing you could not have been metastasizing he could not have been metastasizing we could not have been metastasizing you could not have been metastasizing they could not have been metastasizing

Interrogative form

Simple form	V-ing form
could I metastasize? could you metastasize? could he metastasize? could we metastasize? could you metastasize? could they metastasize?	could I be metastasizing? could you be metastasizing? could he be metastasizing? could we be metastasizing? could you be metastasizing? could they be metastasizing?
Perfect	V-ing perfect
could I have metastasized? could you have metastasized? could he have metastasized? could we have metastasized? could you have metastasized? could they have metastasized?	could I have been metastasizing? could you have been metastasizing? could he have been metastasizing? could we have been metastasizing? could you have been metastasizing? could they have been metastasizing?

Interro-negative form

Simple form	V-ing form
could I not metastasize? could you not metastasize? could he not metastasize? could we not metastasize? could you not metastasize? could they not metastasize?	could I not be metastasizing? could you not be metastasizing? could he not be metastasizing? could we not be metastasizing? could you not be metastasizing? could they not be metastasizing?
Perfect	V-ing perfect
could I not have metastasized? could you not have metastasized? could he not have metastasized? could we not have metastasized? could you not have metastasized? could they not have metastasized?	could I not have been metastasizing? could you not have been metastasizing? could he not have been metastasizing? could we not have been metastasizing? could you not have been metastasizing? could they not have been metastasizing?