English verb conjugation
COULD TWIDDLE

Regular verb: twiddle - twiddled - twiddled

Affirmation

Simple form	V-ing form
I could twiddle you could twiddle she could twiddle we could twiddle you could twiddle they could twiddle	I could be twiddling you could be twiddling she could be twiddling we could be twiddling you could be twiddling they could be twiddling
Perfect	V-ing perfect
I could have twiddled you could have twiddled she could have twiddled we could have twiddled you could have twiddled they could have twiddled	I could have been twiddling you could have been twiddling she could have been twiddling we could have been twiddling you could have been twiddling they could have been twiddling

Negation

Simple form	V-ing form
I couldn't twiddle you couldn't twiddle she couldn't twiddle we couldn't twiddle you couldn't twiddle they couldn't twiddle	I couldn't be twiddling you couldn't be twiddling she couldn't be twiddling we couldn't be twiddling you couldn't be twiddling they couldn't be twiddling
Perfect	V-ing perfect
I couldn't have twiddled you couldn't have twiddled she couldn't have twiddled we couldn't have twiddled you couldn't have twiddled they couldn't have twiddled	I couldn't have been twiddling you couldn't have been twiddling she couldn't have been twiddling we couldn't have been twiddling you couldn't have been twiddling they couldn't have been twiddling

Interrogative form

Simple form	V-ing form
could I twiddle? could you twiddle? could she twiddle? could we twiddle? could you twiddle? could they twiddle?	could I be twiddling? could you be twiddling? could she be twiddling? could we be twiddling? could you be twiddling? could they be twiddling?
Perfect	V-ing perfect
could I have twiddled? could you have twiddled? could she have twiddled? could we have twiddled? could you have twiddled? could they have twiddled?	could I have been twiddling? could you have been twiddling? could she have been twiddling? could we have been twiddling? could you have been twiddling? could they have been twiddling?

Interro-negative form

Simple form	V-ing form
couldn't I twiddle? couldn't you twiddle? couldn't she twiddle? couldn't we twiddle? couldn't you twiddle? couldn't they twiddle?	couldn't I be twiddling? couldn't you be twiddling? couldn't she be twiddling? couldn't we be twiddling? couldn't you be twiddling? couldn't they be twiddling?
Perfect	V-ing perfect
couldn't I have twiddled? couldn't you have twiddled? couldn't she have twiddled? couldn't we have twiddled? couldn't you have twiddled? couldn't they have twiddled?	couldn't I have been twiddling? couldn't you have been twiddling? couldn't she have been twiddling? couldn't we have been twiddling? couldn't you have been twiddling? couldn't they have been twiddling?