"he enjoys their praising her children at school. using passive voice, 为什么要加being？"

In this sentence, the phrase "their praising her children at school" is in active voice. To convert it into passive voice, the sentence should be rephrased as: "She enjoys her children being praised at school." In the passive voice construction, the subject (her children) becomes the object (her children) and the verb (praising) is changed to its passive form (being praised). The use of "being" is necessary to indicate the action happening to the subject (her children).

”龚凤军笑言。， 大赛是对近年来我省在5G+工业互联网领域创新应用的一次检验，充分展示了5G赋能工业领域的显著成效，促进了5G规模化应用在更大范围、更深程度、更高水平上实现高质量发展。

11月13日讯 今天，国际米兰俱乐部宣布与卡塔尔航空达成赞助协议。，赔款与给付支出1.4万亿元，同比增长20.1%。

在遍地金黄的银杏林里漫步，我们就是自己人生的主角。，据悉，当时柳俊烈在直播时表示自己是环保主义者，不使用一次性用品，在剧组也是自己带着餐盘。