really actually truly 这三个有什么区别

really 真实地,事实存在,而不是想象 例如：I really don't know how to help you.我真的不知道怎么帮助你actually 实际地,现行地 例如：Actually,he is right.事实上他是对的..truly 判断真实与否的标准 例如：I fee...