填空题（There be sb. doing)

there be sb doing there be sb/sth doing 用there be sb doing sth 造句 关于There be sb/sth doing句型 there be sb.doing sth 怎么paraphrase? there be sb.do sth 还是there be sb.doing sth.有何区别 英语中关系There be sb do/doing sth 的 请问有没有sb.be there +doing sth.这个句型? 请帮我造两个句子,1.there be sb doing 2.there be sb/sth done 英语造句leave sb.doing sth.2句there be +名词+ left 2句have sb.doing There are sb doing sth sb should be doing in doing