English verb conjugation
COULD PRETTIFY

Regular verb: prettify - prettified - prettified

Affirmation

Simple form	V-ing form
I could prettify you could prettify he could prettify we could prettify you could prettify they could prettify	I could be prettifying you could be prettifying he could be prettifying we could be prettifying you could be prettifying they could be prettifying
Perfect	V-ing perfect
I could have prettified you could have prettified he could have prettified we could have prettified you could have prettified they could have prettified	I could have been prettifying you could have been prettifying he could have been prettifying we could have been prettifying you could have been prettifying they could have been prettifying

Negation

Simple form	V-ing form
I could not prettify you could not prettify he could not prettify we could not prettify you could not prettify they could not prettify	I could not be prettifying you could not be prettifying he could not be prettifying we could not be prettifying you could not be prettifying they could not be prettifying
Perfect	V-ing perfect
I could not have prettified you could not have prettified he could not have prettified we could not have prettified you could not have prettified they could not have prettified	I could not have been prettifying you could not have been prettifying he could not have been prettifying we could not have been prettifying you could not have been prettifying they could not have been prettifying

Interrogative form

Simple form	V-ing form
could I prettify? could you prettify? could he prettify? could we prettify? could you prettify? could they prettify?	could I be prettifying? could you be prettifying? could he be prettifying? could we be prettifying? could you be prettifying? could they be prettifying?
Perfect	V-ing perfect
could I have prettified? could you have prettified? could he have prettified? could we have prettified? could you have prettified? could they have prettified?	could I have been prettifying? could you have been prettifying? could he have been prettifying? could we have been prettifying? could you have been prettifying? could they have been prettifying?

Interro-negative form

Simple form	V-ing form
could I not prettify? could you not prettify? could he not prettify? could we not prettify? could you not prettify? could they not prettify?	could I not be prettifying? could you not be prettifying? could he not be prettifying? could we not be prettifying? could you not be prettifying? could they not be prettifying?
Perfect	V-ing perfect
could I not have prettified? could you not have prettified? could he not have prettified? could we not have prettified? could you not have prettified? could they not have prettified?	could I not have been prettifying? could you not have been prettifying? could he not have been prettifying? could we not have been prettifying? could you not have been prettifying? could they not have been prettifying?