wave to sb.与 wave at sb.有什么区别吗?

wave to sb.与 wave at sb.有什么区别吗? wave to sb.和wave at sb.有什么区别 to wave sth at sb wave at sb. wave to sb.例句? wave at和wave to区别 怎么区别是say goodbay to sb还是wave? wave sb goodbye是什么意思 point to sb与point at sb有什么区别? wave at 和wave to的区别是什么,希望有例子, shout to sb.与shout at sb.有什么区别吗? shout to sb和shout at sb有什么区别