English verb conjugation
COULD PERSEVERATE

Regular verb: perseverate - perseverated - perseverated

Affirmation

Simple form	V-ing form
I could perseverate you could perseverate he could perseverate we could perseverate you could perseverate they could perseverate	I could be perseverating you could be perseverating he could be perseverating we could be perseverating you could be perseverating they could be perseverating
Perfect	V-ing perfect
I could have perseverated you could have perseverated he could have perseverated we could have perseverated you could have perseverated they could have perseverated	I could have been perseverating you could have been perseverating he could have been perseverating we could have been perseverating you could have been perseverating they could have been perseverating

Negation

Simple form	V-ing form
I could not perseverate you could not perseverate he could not perseverate we could not perseverate you could not perseverate they could not perseverate	I could not be perseverating you could not be perseverating he could not be perseverating we could not be perseverating you could not be perseverating they could not be perseverating
Perfect	V-ing perfect
I could not have perseverated you could not have perseverated he could not have perseverated we could not have perseverated you could not have perseverated they could not have perseverated	I could not have been perseverating you could not have been perseverating he could not have been perseverating we could not have been perseverating you could not have been perseverating they could not have been perseverating

Interrogative form

Simple form	V-ing form
could I perseverate? could you perseverate? could he perseverate? could we perseverate? could you perseverate? could they perseverate?	could I be perseverating? could you be perseverating? could he be perseverating? could we be perseverating? could you be perseverating? could they be perseverating?
Perfect	V-ing perfect
could I have perseverated? could you have perseverated? could he have perseverated? could we have perseverated? could you have perseverated? could they have perseverated?	could I have been perseverating? could you have been perseverating? could he have been perseverating? could we have been perseverating? could you have been perseverating? could they have been perseverating?

Interro-negative form

Simple form	V-ing form
could I not perseverate? could you not perseverate? could he not perseverate? could we not perseverate? could you not perseverate? could they not perseverate?	could I not be perseverating? could you not be perseverating? could he not be perseverating? could we not be perseverating? could you not be perseverating? could they not be perseverating?
Perfect	V-ing perfect
could I not have perseverated? could you not have perseverated? could he not have perseverated? could we not have perseverated? could you not have perseverated? could they not have perseverated?	could I not have been perseverating? could you not have been perseverating? could he not have been perseverating? could we not have been perseverating? could you not have been perseverating? could they not have been perseverating?