English verb conjugation
COULD REGRIND

Irregular verb: regrind - reground - reground

Affirmation

Simple form	V-ing form
I could regrind you could regrind he could regrind we could regrind you could regrind they could regrind	I could be regrinding you could be regrinding he could be regrinding we could be regrinding you could be regrinding they could be regrinding
Perfect	V-ing perfect
I could have reground you could have reground he could have reground we could have reground you could have reground they could have reground	I could have been regrinding you could have been regrinding he could have been regrinding we could have been regrinding you could have been regrinding they could have been regrinding

Negation

Simple form	V-ing form
I could not regrind you could not regrind he could not regrind we could not regrind you could not regrind they could not regrind	I could not be regrinding you could not be regrinding he could not be regrinding we could not be regrinding you could not be regrinding they could not be regrinding
Perfect	V-ing perfect
I could not have reground you could not have reground he could not have reground we could not have reground you could not have reground they could not have reground	I could not have been regrinding you could not have been regrinding he could not have been regrinding we could not have been regrinding you could not have been regrinding they could not have been regrinding

Interrogative form

Simple form	V-ing form
could I regrind? could you regrind? could he regrind? could we regrind? could you regrind? could they regrind?	could I be regrinding? could you be regrinding? could he be regrinding? could we be regrinding? could you be regrinding? could they be regrinding?
Perfect	V-ing perfect
could I have reground? could you have reground? could he have reground? could we have reground? could you have reground? could they have reground?	could I have been regrinding? could you have been regrinding? could he have been regrinding? could we have been regrinding? could you have been regrinding? could they have been regrinding?

Interro-negative form

Simple form	V-ing form
could I not regrind? could you not regrind? could he not regrind? could we not regrind? could you not regrind? could they not regrind?	could I not be regrinding? could you not be regrinding? could he not be regrinding? could we not be regrinding? could you not be regrinding? could they not be regrinding?
Perfect	V-ing perfect
could I not have reground? could you not have reground? could he not have reground? could we not have reground? could you not have reground? could they not have reground?	could I not have been regrinding? could you not have been regrinding? could he not have been regrinding? could we not have been regrinding? could you not have been regrinding? could they not have been regrinding?