as to the children finishing assignments,i believe that they can't enjoy themselves with their assignments unfinished.
句中出现两处介词的复合结构 即介词加宾语加宾补的情形 不懂这句话~ 顺便说下句子的意思
前半句as to the children finishing assignments 的意思是“说到(或至于)儿童完成课外作业”。其中——
as to是复合介词,意思是“谈到/关于/至于”。
the children finishing assignments 是动名词的复合结构,此处用作复合介词 as to 的宾语。其中,finishing assignments 是动名词短语,the children 是动名词的逻辑主语。在正式文体中,动名词的复合结构一般用“名词所有格+动名词”表示,不过在口语中作宾语的时候常常用“主格+动名词”代替。
后半句I believe that they can't enjoy themselves with their assignments unfinished 是常见的“主句+宾语从句”结构,意思是“我认为他们(指儿童)由于没有完成作业而过得并不愉快”。其中——
enjoy oneself指“尽情地自我享受”,可以变通为“过得愉快/玩得痛快”
with their assignments unfinished 是独立主格结构,即“with + their assignments(逻辑主语) + unfinished(过去分词“”,此处是原因状语,相当于从句 because their assignments were unfinished(因为他们的课外作业没有完成)的作用及意思。
【参考译文】提到儿童完成课外作业这一点,我认为他们在没有完成作业情况下不能痛痛快快地玩耍。