English verb conjugation
COULD SPOT-CHECK

Regular verb: spot-check - spot-checked - spot-checked

Affirmation

Simple form	V-ing form
I could spot-check you could spot-check he could spot-check we could spot-check you could spot-check they could spot-check	I could be spot-checking you could be spot-checking he could be spot-checking we could be spot-checking you could be spot-checking they could be spot-checking
Perfect	V-ing perfect
I could have spot-checked you could have spot-checked he could have spot-checked we could have spot-checked you could have spot-checked they could have spot-checked	I could have been spot-checking you could have been spot-checking he could have been spot-checking we could have been spot-checking you could have been spot-checking they could have been spot-checking

Negation

Simple form	V-ing form
I could not spot-check you could not spot-check he could not spot-check we could not spot-check you could not spot-check they could not spot-check	I could not be spot-checking you could not be spot-checking he could not be spot-checking we could not be spot-checking you could not be spot-checking they could not be spot-checking
Perfect	V-ing perfect
I could not have spot-checked you could not have spot-checked he could not have spot-checked we could not have spot-checked you could not have spot-checked they could not have spot-checked	I could not have been spot-checking you could not have been spot-checking he could not have been spot-checking we could not have been spot-checking you could not have been spot-checking they could not have been spot-checking

Interrogative form

Simple form	V-ing form
could I spot-check? could you spot-check? could he spot-check? could we spot-check? could you spot-check? could they spot-check?	could I be spot-checking? could you be spot-checking? could he be spot-checking? could we be spot-checking? could you be spot-checking? could they be spot-checking?
Perfect	V-ing perfect
could I have spot-checked? could you have spot-checked? could he have spot-checked? could we have spot-checked? could you have spot-checked? could they have spot-checked?	could I have been spot-checking? could you have been spot-checking? could he have been spot-checking? could we have been spot-checking? could you have been spot-checking? could they have been spot-checking?

Interro-negative form

Simple form	V-ing form
could I not spot-check? could you not spot-check? could he not spot-check? could we not spot-check? could you not spot-check? could they not spot-check?	could I not be spot-checking? could you not be spot-checking? could he not be spot-checking? could we not be spot-checking? could you not be spot-checking? could they not be spot-checking?
Perfect	V-ing perfect
could I not have spot-checked? could you not have spot-checked? could he not have spot-checked? could we not have spot-checked? could you not have spot-checked? could they not have spot-checked?	could I not have been spot-checking? could you not have been spot-checking? could he not have been spot-checking? could we not have been spot-checking? could you not have been spot-checking? could they not have been spot-checking?