sb. seem unhappy和seem to be unhappy区别?它们在用法和意思上有什么区别?

sb. seem unhappy和seem to be unhappy区别?它们在用法和意思上有什么区别? seem unhappy造句 see to do sth和seem see sb doing 和see sb do区别用法 see sb to do和see sb doing的区别? see sb.do和see sb.doing 怎样区分? 关于see sb do和see sb doing的例句 see sb doing和see sb do有什么区别 sb seem to get mad at sb和seem to do see sb doing和see sb do 和see sb done区别 see sb. see sb 》 sb seem to do sth see+句子 可以和see sb do/doing 互换吗 watch/see/hear+sb+do sth 和watch/see/hear+sb+doing sth see sb.do sth和see sb.doing sth有什么区别具体有什么区别 see sb.do sth.和see sb.doing sth.有什么区别?