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问题 than引导比较状语从句时，究竟是从属连词还是关系代词/关系副词

...s necessary.      He often eats more than is good for his health.      More people hope to live in the countryside than used to (do).      以上三句都是百分之百正确的句子。但than从句的主语呢？如果是...

问题 since后接终止性动词与持续性动词的含义区别

...e he studied English 他好久没学英语了.You haven’t come to see me for two months.你有两个月没来看我了。（完）谢谢！