seem to do seem to have done

seem to do seem to have done seem to do和seem to have done的区别 seem to be doing sth ,seem to do ,seem to have done sth seem to be done 英语翻译seem to ,have a done seem to do seem to do 还是 seem doing? seem to sb seem to do sth seem 后加to do seem to do sth是什么意思? seem to do sth 中文