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 couldn't pervade you couldn't pervade she couldn't pervade we couldn't pervade you couldn't pervade they couldn't pervade	I couldn't be pervading you couldn't be pervading she couldn't be pervading we couldn't be pervading you couldn't be pervading they couldn't be pervading
Perfect	V-ing perfect
I couldn't have pervaded you couldn't have pervaded she couldn't have pervaded we couldn't have pervaded you couldn't have pervaded they couldn't have pervaded	I couldn't have been pervading you couldn't have been pervading she couldn't have been pervading we couldn't have been pervading you couldn't have been pervading they couldn't 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
couldn't I pervade? couldn't you pervade? couldn't she pervade? couldn't we pervade? couldn't you pervade? couldn't they pervade?	couldn't I be pervading? couldn't you be pervading? couldn't she be pervading? couldn't we be pervading? couldn't you be pervading? couldn't they be pervading?
Perfect	V-ing perfect
couldn't I have pervaded? couldn't you have pervaded? couldn't she have pervaded? couldn't we have pervaded? couldn't you have pervaded? couldn't they have pervaded?	couldn't I have been pervading? couldn't you have been pervading? couldn't she have been pervading? couldn't we have been pervading? couldn't you have been pervading? couldn't they have been pervading?