Определите форму и функцию инфинитива в данных предложениях. Подчеркните инфинитив. Переведите предложения на русский язык. 1) I’ve done all I could to help him. 2) He hates to be asked so many questions. 3) It was natural for him to speak much. 4) The idea was too complicated to be expressed in one sentence.