iphone音乐播放顺序:holp sb ( to do 还是 ding )?

holp sb ( to do 还是 ding )? want to sb to do help sb. to do sh. help sb. do sth还是help sb to do sth? help sb. do sth还是help sb to do sth? get sb do sth还是get sb to do sth let sb. do sth.or let sb.to do sth 是help sb. do help还是sb. to do？ compare sb to do什么意思 allow sb. to do sth.吗？