tinyhuhus

(C) Josephine Baker made Paris her home long before to be an expatriate was fashionable,
如果不是放句首 long before 之前就必须有逗号，不然有可能歧义
比如：JK made P her home long, before ....

Josephine Baker made Paris her home, long before it was fashionable to be an expatriate, and shen remained ...
但是这样也不行，因为不知道long bfore的表达到底是先在JB made Pairs her home 之前，还是 she remained 之前。
所以如果一定要这个表达就是 JP made P her home, long before it was fashionable to be expatrate; and she remianed...

另外JK made P her home, long before to be an expariate was fashinable; and she remianed... 是不行的
因为 long before从句是 JK made P home的time clause, 所以它的逻辑主语就是JK。而不能把to be expariate 当成 time clause的主语。所以It was fashionalbe to be expatiate是必须的，这样才能明确time clause的主语和main clause 不是一个。