Отрицательная форма глагола to be (am not, isn’t, aren’t)

{"questions":[{"content":"Соедини слова с переводом. [[matcher-1]]","widgets":{"matcher-1":{"type":"matcher","labels":["a bird","a fish"],"items":["птица","рыба"]}}},{"content":"По какому слову можно легко узнать отрицательное предложение? [[choice-5]]","widgets":{"choice-5":{"type":"choice","options":["не","нет","никак нельзя"],"answer":[0]}}}]}

{"questions":[{"content":"Соедини отрицательную форму «to be» с местоимениями. [[grouper-1]]","widgets":{"grouper-1":{"type":"grouper","labels":["am not","is not","are not"],"items":[["I"],["he","she","it"],["we","they","you"]]}}},{"content":"[[speech-12]] [[sentence-18]]","widgets":{"speech-12":{"type":"speech","text":"Птица немаленькая."},"sentence-18":{"type":"sentence","words":["The bird","is","not","small."],"extra":["are"]}},"hints":["«The bird» — существительное в единственном числе.","Поэтому нужна форма «is»."]},{"content":"Выбери правильный вариант ответа.<br />I [[fill_choice_big-55]] short.","widgets":{"fill_choice_big-55":{"type":"fill_choice_big","options":["am not","is not"],"answer":0}},"hints":["С «I» используется «am»."]}]}

{"questions":[{"content":"Соедини краткие формы с полными. Один вариант ответа лишний. [[matcher-1]]","widgets":{"matcher-1":{"type":"matcher","labels":["I am not","He is not","They are not"],"items":["I'm not","He isn't","They aren't","I amn't"]}}},{"content":"Выбери правильный вариант ответа.<br />We have rulers. They [[fill_choice_big-10]] long.","widgets":{"fill_choice_big-10":{"type":"fill_choice_big","options":["aren't","isn't"],"answer":0}},"hints":["We have — «у нас есть».","С «they» используется «aren't»."]},{"content":"[[speech-25]] [[sentence-34]]","widgets":{"speech-25":{"type":"speech","text":"Мой папа не дома."},"sentence-34":{"type":"sentence","words":["My father","isn't","at","home."],"extra":["am not"]}},"hints":["My — «мой».","«Father» — существительное в единственном числе.","Поэтому нужна форма «isn't»."]}]}