English verb conjugation
COULD OBTURATE

Regular verb: obturate - obturated - obturated

Affirmation

Simple form	V-ing form
I could obturate you could obturate he could obturate we could obturate you could obturate they could obturate	I could be obturating you could be obturating he could be obturating we could be obturating you could be obturating they could be obturating
Perfect	V-ing perfect
I could have obturated you could have obturated he could have obturated we could have obturated you could have obturated they could have obturated	I could have been obturating you could have been obturating he could have been obturating we could have been obturating you could have been obturating they could have been obturating

Negation

Simple form	V-ing form
I couldn't obturate you couldn't obturate he couldn't obturate we couldn't obturate you couldn't obturate they couldn't obturate	I couldn't be obturating you couldn't be obturating he couldn't be obturating we couldn't be obturating you couldn't be obturating they couldn't be obturating
Perfect	V-ing perfect
I couldn't have obturated you couldn't have obturated he couldn't have obturated we couldn't have obturated you couldn't have obturated they couldn't have obturated	I couldn't have been obturating you couldn't have been obturating he couldn't have been obturating we couldn't have been obturating you couldn't have been obturating they couldn't have been obturating

Interrogative form

Simple form	V-ing form
could I obturate? could you obturate? could he obturate? could we obturate? could you obturate? could they obturate?	could I be obturating? could you be obturating? could he be obturating? could we be obturating? could you be obturating? could they be obturating?
Perfect	V-ing perfect
could I have obturated? could you have obturated? could he have obturated? could we have obturated? could you have obturated? could they have obturated?	could I have been obturating? could you have been obturating? could he have been obturating? could we have been obturating? could you have been obturating? could they have been obturating?

Interro-negative form

Simple form	V-ing form
couldn't I obturate? couldn't you obturate? couldn't he obturate? couldn't we obturate? couldn't you obturate? couldn't they obturate?	couldn't I be obturating? couldn't you be obturating? couldn't he be obturating? couldn't we be obturating? couldn't you be obturating? couldn't they be obturating?
Perfect	V-ing perfect
couldn't I have obturated? couldn't you have obturated? couldn't he have obturated? couldn't we have obturated? couldn't you have obturated? couldn't they have obturated?	couldn't I have been obturating? couldn't you have been obturating? couldn't he have been obturating? couldn't we have been obturating? couldn't you have been obturating? couldn't they have been obturating?