hear the news,I was heart broken.为什么要变为Hearing?

I was disappointed to hear the news中的to hear the news在句中做什么成分? I was _______（shock） to hear of the news I'm s____when I hear the news i( )(hear)the news this morning. i hear the news two weeks I was sorry to hear the news.中文意思,另外不定式to 的应用, hear the news,I was heart broken.为什么要变为Hearing? He was amazed to hear the news.He was ____ ____ the news.变同义句 when she（） hear the news she was very excited L was relly ________ to hear the good news he was pleased to () the news中是填hear还是listen Everybody was happy to hear the exciting news He was （amuse | amusing）to hear the news Every body was happy to hear the exciting news. She was happy to hear the news.同义句=The news ____ ____ _____ I would rather they_(not hear) of the news I‘m___(true)happy to hear the news. 例：I am surprise to hear the news 不是surprising?