English verb conjugation
COULD ANKYLOSE

Regular verb: ankylose - ankylosed - ankylosed

Affirmation

Simple form	V-ing form
I could ankylose you could ankylose he could ankylose we could ankylose you could ankylose they could ankylose	I could be ankylosing you could be ankylosing he could be ankylosing we could be ankylosing you could be ankylosing they could be ankylosing
Perfect	V-ing perfect
I could have ankylosed you could have ankylosed he could have ankylosed we could have ankylosed you could have ankylosed they could have ankylosed	I could have been ankylosing you could have been ankylosing he could have been ankylosing we could have been ankylosing you could have been ankylosing they could have been ankylosing

Negation

Simple form	V-ing form
I could not ankylose you could not ankylose he could not ankylose we could not ankylose you could not ankylose they could not ankylose	I could not be ankylosing you could not be ankylosing he could not be ankylosing we could not be ankylosing you could not be ankylosing they could not be ankylosing
Perfect	V-ing perfect
I could not have ankylosed you could not have ankylosed he could not have ankylosed we could not have ankylosed you could not have ankylosed they could not have ankylosed	I could not have been ankylosing you could not have been ankylosing he could not have been ankylosing we could not have been ankylosing you could not have been ankylosing they could not have been ankylosing

Interrogative form

Simple form	V-ing form
could I ankylose? could you ankylose? could he ankylose? could we ankylose? could you ankylose? could they ankylose?	could I be ankylosing? could you be ankylosing? could he be ankylosing? could we be ankylosing? could you be ankylosing? could they be ankylosing?
Perfect	V-ing perfect
could I have ankylosed? could you have ankylosed? could he have ankylosed? could we have ankylosed? could you have ankylosed? could they have ankylosed?	could I have been ankylosing? could you have been ankylosing? could he have been ankylosing? could we have been ankylosing? could you have been ankylosing? could they have been ankylosing?

Interro-negative form

Simple form	V-ing form
could I not ankylose? could you not ankylose? could he not ankylose? could we not ankylose? could you not ankylose? could they not ankylose?	could I not be ankylosing? could you not be ankylosing? could he not be ankylosing? could we not be ankylosing? could you not be ankylosing? could they not be ankylosing?
Perfect	V-ing perfect
could I not have ankylosed? could you not have ankylosed? could he not have ankylosed? could we not have ankylosed? could you not have ankylosed? could they not have ankylosed?	could I not have been ankylosing? could you not have been ankylosing? could he not have been ankylosing? could we not have been ankylosing? could you not have been ankylosing? could they not have been ankylosing?