怎么区别是say goodbay to sb还是wave?

怎么区别是say goodbay to sb还是wave? wave to sb.和wave at sb.有什么区别 是say to sb,还是speak to sb? say的句型是say to sb sth 还是 say sth to sb wave to sb.与 wave at sb.有什么区别吗? wave to sb.例句? 是say to sb? wave to say goodbye是什么意思? to wave sth at sb say sb do sth还是 say sb to do sth? say sth to sb ,say是双宾语? wave at和wave to区别