关于those作为代词的使用问题,以及句子结构分析Backinthe,probablyIwouldsaythis,thebeginningofthe70sandintotheearly80s,quiteabitofworkdoneonspontaneousmiscarrigeinrelationtoseveralaspectsofwhatwecalled

Question

关于those作为代词的使用问题,以及句子结构分析
Back in the ,probably I would say this,the beginning of the 70s and into the early 80s,quite a bit of work done on spontaneous miscarrige in relation to several aspects of what we called "immune problems antibodies" and related to those are the blood groups.
此句中的those 所代指句中什么,另外quite a bit of work done是不是中间省略了has been呢?求高人帮忙分析一下句子结构.

Answer 1

those指代immune problems antibodies,在没有上下文的情况下,可以认为work前省略了was.
Back in the ,probably I would say this,the beginning of the 70s and into the early 80s,介词短语做时间状语,probably I would say this,插入语,可以不要.quite a bit of work was done on spontaneous miscarrige in relation to several aspects of what we called "immune problems antibodies" and related to those are the blood groups.是简单句.主语quite a bit of work,谓语动词 was done .on spontaneous miscarrige in relation to several aspects of what we called "immune problems antibodies" and related to those are the blood groups是状语.