hear of、hear from、hear的区别和用法是什么?举例

1.hear of,表示‘听说’,后面加sth/sbHave you ever heard of the Great Wall?你听说过长城吧?2.hear from sb.‘收到...的来信’I heard from my father last week.我上周收到老爸来信.3.hear‘听到’,‘听说(后加宾...