English verb conjugation
COULD PERVADE

Regular verb: pervade - pervaded - pervaded

Affirmation

Simple form	V-ing form
I could pervade you could pervade she could pervade we could pervade you could pervade they could pervade	I could be pervading you could be pervading she could be pervading we could be pervading you could be pervading they could be pervading
Perfect	V-ing perfect
I could have pervaded you could have pervaded she could have pervaded we could have pervaded you could have pervaded they could have pervaded	I could have been pervading you could have been pervading she could have been pervading we could have been pervading you could have been pervading they could have been pervading

Negation

Simple form	V-ing form
I could not pervade you could not pervade she could not pervade we could not pervade you could not pervade they could not pervade	I could not be pervading you could not be pervading she could not be pervading we could not be pervading you could not be pervading they could not be pervading
Perfect	V-ing perfect
I could not have pervaded you could not have pervaded she could not have pervaded we could not have pervaded you could not have pervaded they could not have pervaded	I could not have been pervading you could not have been pervading she could not have been pervading we could not have been pervading you could not have been pervading they could not have been pervading

Interrogative form

Simple form	V-ing form
could I pervade? could you pervade? could she pervade? could we pervade? could you pervade? could they pervade?	could I be pervading? could you be pervading? could she be pervading? could we be pervading? could you be pervading? could they be pervading?
Perfect	V-ing perfect
could I have pervaded? could you have pervaded? could she have pervaded? could we have pervaded? could you have pervaded? could they have pervaded?	could I have been pervading? could you have been pervading? could she have been pervading? could we have been pervading? could you have been pervading? could they have been pervading?

Interro-negative form

Simple form	V-ing form
could I not pervade? could you not pervade? could she not pervade? could we not pervade? could you not pervade? could they not pervade?	could I not be pervading? could you not be pervading? could she not be pervading? could we not be pervading? could you not be pervading? could they not be pervading?
Perfect	V-ing perfect
could I not have pervaded? could you not have pervaded? could she not have pervaded? could we not have pervaded? could you not have pervaded? could they not have pervaded?	could I not have been pervading? could you not have been pervading? could she not have been pervading? could we not have been pervading? could you not have been pervading? could they not have been pervading?