...做意思讲时是介词,可第一个句子为什么as后面跟了serious形容词呢,又是怎样的一种用法呢?4词性没给,释义:在某一阶段时。As a young man ,Eliot had stuided art in Paris综上,as当在某一阶段时,词性是介词。词典里的PHR -CONj-COORD是...
...去分词+that从句:It's reported that...(据报道……)It is+形容词+that从句:It is clear that...(显然……)It is+名词短语+that从句:It is a pity that...(可惜的是……)It+不及物动词+that从句:It seems that...似乎……其他结构:It occur...