English verb conjugation
COULD EFFACE

Regular verb: efface - effaced - effaced

Affirmation

Simple form	V-ing form
I could efface you could efface he could efface we could efface you could efface they could efface	I could be effacing you could be effacing he could be effacing we could be effacing you could be effacing they could be effacing
Perfect	V-ing perfect
I could have effaced you could have effaced he could have effaced we could have effaced you could have effaced they could have effaced	I could have been effacing you could have been effacing he could have been effacing we could have been effacing you could have been effacing they could have been effacing

Negation

Simple form	V-ing form
I couldn't efface you couldn't efface he couldn't efface we couldn't efface you couldn't efface they couldn't efface	I couldn't be effacing you couldn't be effacing he couldn't be effacing we couldn't be effacing you couldn't be effacing they couldn't be effacing
Perfect	V-ing perfect
I couldn't have effaced you couldn't have effaced he couldn't have effaced we couldn't have effaced you couldn't have effaced they couldn't have effaced	I couldn't have been effacing you couldn't have been effacing he couldn't have been effacing we couldn't have been effacing you couldn't have been effacing they couldn't have been effacing

Interrogative form

Simple form	V-ing form
could I efface? could you efface? could he efface? could we efface? could you efface? could they efface?	could I be effacing? could you be effacing? could he be effacing? could we be effacing? could you be effacing? could they be effacing?
Perfect	V-ing perfect
could I have effaced? could you have effaced? could he have effaced? could we have effaced? could you have effaced? could they have effaced?	could I have been effacing? could you have been effacing? could he have been effacing? could we have been effacing? could you have been effacing? could they have been effacing?

Interro-negative form

Simple form	V-ing form
couldn't I efface? couldn't you efface? couldn't he efface? couldn't we efface? couldn't you efface? couldn't they efface?	couldn't I be effacing? couldn't you be effacing? couldn't he be effacing? couldn't we be effacing? couldn't you be effacing? couldn't they be effacing?
Perfect	V-ing perfect
couldn't I have effaced? couldn't you have effaced? couldn't he have effaced? couldn't we have effaced? couldn't you have effaced? couldn't they have effaced?	couldn't I have been effacing? couldn't you have been effacing? couldn't he have been effacing? couldn't we have been effacing? couldn't you have been effacing? couldn't they have been effacing?