Taking into account that (T) means True and (F) means False...
(__) - The words just, already, always, for, since, yet, still can replace ‘never’, depending the kind of sentence;
(__) - Changing the underlined words into a question, it’s enough put the auxiliary verb before the subject;
(__) - The negative sentences also accepts ‘yet’ and ‘still’;
(__) - ‘for’ and ‘since’ indicates how long the action has been taking.