介宾短语比较 VS 状语比较 摘自PREP和白勇语法 有点疑问
PREP
主语若相同,可省,但助动词不能省。如:
As a result of the continuing decline in the birth rate, [fewer people] will enter the labor force [in the 1980’s] than (few people
省略)did [in the 1960’s and 1970’s], a twenty-year period during which people born after the war swelled the ranks of workers.
白勇语法和MANHATTAN
比较从句的主语和谓语与主句的主语和谓语相同时,可以全部省去,常常保留做状语的介词短语或状语从句
上面两个说法会不会矛盾了呢?按白勇语法的话 上面那个句子的 did是不是应该可以省略啊?
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