English verb conjugation
COULD SINICIZE

Regular verb: sinicize - sinicized - sinicized

Affirmation

Simple form	V-ing form
I could sinicize you could sinicize he could sinicize we could sinicize you could sinicize they could sinicize	I could be sinicizing you could be sinicizing he could be sinicizing we could be sinicizing you could be sinicizing they could be sinicizing
Perfect	V-ing perfect
I could have sinicized you could have sinicized he could have sinicized we could have sinicized you could have sinicized they could have sinicized	I could have been sinicizing you could have been sinicizing he could have been sinicizing we could have been sinicizing you could have been sinicizing they could have been sinicizing

Negation

Simple form	V-ing form
I couldn't sinicize you couldn't sinicize he couldn't sinicize we couldn't sinicize you couldn't sinicize they couldn't sinicize	I couldn't be sinicizing you couldn't be sinicizing he couldn't be sinicizing we couldn't be sinicizing you couldn't be sinicizing they couldn't be sinicizing
Perfect	V-ing perfect
I couldn't have sinicized you couldn't have sinicized he couldn't have sinicized we couldn't have sinicized you couldn't have sinicized they couldn't have sinicized	I couldn't have been sinicizing you couldn't have been sinicizing he couldn't have been sinicizing we couldn't have been sinicizing you couldn't have been sinicizing they couldn't have been sinicizing

Interrogative form

Simple form	V-ing form
could I sinicize? could you sinicize? could he sinicize? could we sinicize? could you sinicize? could they sinicize?	could I be sinicizing? could you be sinicizing? could he be sinicizing? could we be sinicizing? could you be sinicizing? could they be sinicizing?
Perfect	V-ing perfect
could I have sinicized? could you have sinicized? could he have sinicized? could we have sinicized? could you have sinicized? could they have sinicized?	could I have been sinicizing? could you have been sinicizing? could he have been sinicizing? could we have been sinicizing? could you have been sinicizing? could they have been sinicizing?

Interro-negative form

Simple form	V-ing form
couldn't I sinicize? couldn't you sinicize? couldn't he sinicize? couldn't we sinicize? couldn't you sinicize? couldn't they sinicize?	couldn't I be sinicizing? couldn't you be sinicizing? couldn't he be sinicizing? couldn't we be sinicizing? couldn't you be sinicizing? couldn't they be sinicizing?
Perfect	V-ing perfect
couldn't I have sinicized? couldn't you have sinicized? couldn't he have sinicized? couldn't we have sinicized? couldn't you have sinicized? couldn't they have sinicized?	couldn't I have been sinicizing? couldn't you have been sinicizing? couldn't he have been sinicizing? couldn't we have been sinicizing? couldn't you have been sinicizing? couldn't they have been sinicizing?