didn't "... I didn't see him." (Fitzgerald)
I'd "Another shot and I'd have gone to kingdom come." (Stevenson)
you'd "... and I beg you'd believe me ..." (Gray)
hadn't "... if you hadn't seen her ..." (H. James)
hasn't "This ought to have made me gay, but it hasn't." (Stevenson)
couldn't "If it were easy to write a play, I couldn't ... think of it." (H. James)
wasn't "Wasn't it curious?" (Carroll)