在and 后面逗号的作用the guest had,of course ,realized this from the moment bessie opened the door for them and ,long before the final catastrophe,had had a difficult time trying to conceal their amusement.请问在这句句中and 后面的逗

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在and 后面逗号的作用the guest had,of course ,realized this from the moment bessie opened the door for them and ,long before the final catastrophe,had had a difficult time trying to conceal their amusement.请问在这句句中and 后面的逗
在and 后面逗号的作用
the guest had,of course ,realized this from the moment bessie opened the door for them and ,long before the final catastrophe,had had a difficult time trying to conceal their amusement.
请问在这句句中and 后面的逗号是什么作用?为什么要加在and后面呢?还有of course前后为何也要家逗号呢?

在and 后面逗号的作用the guest had,of course ,realized this from the moment bessie opened the door for them and ,long before the final catastrophe,had had a difficult time trying to conceal their amusement.请问在这句句中and 后面的逗
,long before the final catastrophe,这段是插入语
and 是连接 had had a difficult …… 这句的
of course 一个道理
He,of course,is a policeman
当然了,他是一个警察

照语法说,逗号可以出现在任何位置作为插入语,这里就是这种用法,而且不一定在and后面,可以在很多部分后面.
而插入与也只是补充说明或没有意义而只是调节语气的作用.
这里的of course就是后一种作用

同位语

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