English verb conjugation
COULD TWEAK

Regular verb: tweak - tweaked - tweaked

Affirmation

Simple form	V-ing form
I could tweak you could tweak he could tweak we could tweak you could tweak they could tweak	I could be tweaking you could be tweaking he could be tweaking we could be tweaking you could be tweaking they could be tweaking
Perfect	V-ing perfect
I could have tweaked you could have tweaked he could have tweaked we could have tweaked you could have tweaked they could have tweaked	I could have been tweaking you could have been tweaking he could have been tweaking we could have been tweaking you could have been tweaking they could have been tweaking

Negation

Simple form	V-ing form
I could not tweak you could not tweak he could not tweak we could not tweak you could not tweak they could not tweak	I could not be tweaking you could not be tweaking he could not be tweaking we could not be tweaking you could not be tweaking they could not be tweaking
Perfect	V-ing perfect
I could not have tweaked you could not have tweaked he could not have tweaked we could not have tweaked you could not have tweaked they could not have tweaked	I could not have been tweaking you could not have been tweaking he could not have been tweaking we could not have been tweaking you could not have been tweaking they could not have been tweaking

Interrogative form

Simple form	V-ing form
could I tweak? could you tweak? could he tweak? could we tweak? could you tweak? could they tweak?	could I be tweaking? could you be tweaking? could he be tweaking? could we be tweaking? could you be tweaking? could they be tweaking?
Perfect	V-ing perfect
could I have tweaked? could you have tweaked? could he have tweaked? could we have tweaked? could you have tweaked? could they have tweaked?	could I have been tweaking? could you have been tweaking? could he have been tweaking? could we have been tweaking? could you have been tweaking? could they have been tweaking?

Interro-negative form

Simple form	V-ing form
could I not tweak? could you not tweak? could he not tweak? could we not tweak? could you not tweak? could they not tweak?	could I not be tweaking? could you not be tweaking? could he not be tweaking? could we not be tweaking? could you not be tweaking? could they not be tweaking?
Perfect	V-ing perfect
could I not have tweaked? could you not have tweaked? could he not have tweaked? could we not have tweaked? could you not have tweaked? could they not have tweaked?	could I not have been tweaking? could you not have been tweaking? could he not have been tweaking? could we not have been tweaking? could you not have been tweaking? could they not have been tweaking?