English verb conjugation
COULD TAINT

Regular verb: taint - tainted - tainted

Affirmation

Simple form	V-ing form
I could taint you could taint he could taint we could taint you could taint they could taint	I could be tainting you could be tainting he could be tainting we could be tainting you could be tainting they could be tainting
Perfect	V-ing perfect
I could have tainted you could have tainted he could have tainted we could have tainted you could have tainted they could have tainted	I could have been tainting you could have been tainting he could have been tainting we could have been tainting you could have been tainting they could have been tainting

Negation

Simple form	V-ing form
I couldn't taint you couldn't taint he couldn't taint we couldn't taint you couldn't taint they couldn't taint	I couldn't be tainting you couldn't be tainting he couldn't be tainting we couldn't be tainting you couldn't be tainting they couldn't be tainting
Perfect	V-ing perfect
I couldn't have tainted you couldn't have tainted he couldn't have tainted we couldn't have tainted you couldn't have tainted they couldn't have tainted	I couldn't have been tainting you couldn't have been tainting he couldn't have been tainting we couldn't have been tainting you couldn't have been tainting they couldn't have been tainting

Interrogative form

Simple form	V-ing form
could I taint? could you taint? could he taint? could we taint? could you taint? could they taint?	could I be tainting? could you be tainting? could he be tainting? could we be tainting? could you be tainting? could they be tainting?
Perfect	V-ing perfect
could I have tainted? could you have tainted? could he have tainted? could we have tainted? could you have tainted? could they have tainted?	could I have been tainting? could you have been tainting? could he have been tainting? could we have been tainting? could you have been tainting? could they have been tainting?

Interro-negative form

Simple form	V-ing form
couldn't I taint? couldn't you taint? couldn't he taint? couldn't we taint? couldn't you taint? couldn't they taint?	couldn't I be tainting? couldn't you be tainting? couldn't he be tainting? couldn't we be tainting? couldn't you be tainting? couldn't they be tainting?
Perfect	V-ing perfect
couldn't I have tainted? couldn't you have tainted? couldn't he have tainted? couldn't we have tainted? couldn't you have tainted? couldn't they have tainted?	couldn't I have been tainting? couldn't you have been tainting? couldn't he have been tainting? couldn't we have been tainting? couldn't you have been tainting? couldn't they have been tainting?