English verb conjugation
COULD QUARRY

Regular verb: quarry - quarried - quarried

Affirmation

Simple form	V-ing form
I could quarry you could quarry he could quarry we could quarry you could quarry they could quarry	I could be quarrying you could be quarrying he could be quarrying we could be quarrying you could be quarrying they could be quarrying
Perfect	V-ing perfect
I could have quarried you could have quarried he could have quarried we could have quarried you could have quarried they could have quarried	I could have been quarrying you could have been quarrying he could have been quarrying we could have been quarrying you could have been quarrying they could have been quarrying

Negation

Simple form	V-ing form
I couldn't quarry you couldn't quarry he couldn't quarry we couldn't quarry you couldn't quarry they couldn't quarry	I couldn't be quarrying you couldn't be quarrying he couldn't be quarrying we couldn't be quarrying you couldn't be quarrying they couldn't be quarrying
Perfect	V-ing perfect
I couldn't have quarried you couldn't have quarried he couldn't have quarried we couldn't have quarried you couldn't have quarried they couldn't have quarried	I couldn't have been quarrying you couldn't have been quarrying he couldn't have been quarrying we couldn't have been quarrying you couldn't have been quarrying they couldn't have been quarrying

Interrogative form

Simple form	V-ing form
could I quarry? could you quarry? could he quarry? could we quarry? could you quarry? could they quarry?	could I be quarrying? could you be quarrying? could he be quarrying? could we be quarrying? could you be quarrying? could they be quarrying?
Perfect	V-ing perfect
could I have quarried? could you have quarried? could he have quarried? could we have quarried? could you have quarried? could they have quarried?	could I have been quarrying? could you have been quarrying? could he have been quarrying? could we have been quarrying? could you have been quarrying? could they have been quarrying?

Interro-negative form

Simple form	V-ing form
couldn't I quarry? couldn't you quarry? couldn't he quarry? couldn't we quarry? couldn't you quarry? couldn't they quarry?	couldn't I be quarrying? couldn't you be quarrying? couldn't he be quarrying? couldn't we be quarrying? couldn't you be quarrying? couldn't they be quarrying?
Perfect	V-ing perfect
couldn't I have quarried? couldn't you have quarried? couldn't he have quarried? couldn't we have quarried? couldn't you have quarried? couldn't they have quarried?	couldn't I have been quarrying? couldn't you have been quarrying? couldn't he have been quarrying? couldn't we have been quarrying? couldn't you have been quarrying? couldn't they have been quarrying?