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 couldn't regrind you couldn't regrind he couldn't regrind we couldn't regrind you couldn't regrind they couldn't regrind	I couldn't be regrinding you couldn't be regrinding he couldn't be regrinding we couldn't be regrinding you couldn't be regrinding they couldn't be regrinding
Perfect	V-ing perfect
I couldn't have reground you couldn't have reground he couldn't have reground we couldn't have reground you couldn't have reground they couldn't have reground	I couldn't have been regrinding you couldn't have been regrinding he couldn't have been regrinding we couldn't have been regrinding you couldn't have been regrinding they couldn't 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
couldn't I regrind? couldn't you regrind? couldn't he regrind? couldn't we regrind? couldn't you regrind? couldn't they regrind?	couldn't I be regrinding? couldn't you be regrinding? couldn't he be regrinding? couldn't we be regrinding? couldn't you be regrinding? couldn't they be regrinding?
Perfect	V-ing perfect
couldn't I have reground? couldn't you have reground? couldn't he have reground? couldn't we have reground? couldn't you have reground? couldn't they have reground?	couldn't I have been regrinding? couldn't you have been regrinding? couldn't he have been regrinding? couldn't we have been regrinding? couldn't you have been regrinding? couldn't they have been regrinding?