He is one of those people who promise more than can be done.
也可以變成主動語態(tài)的：He is one of those people who promise more things than they do.
好,現(xiàn)在來回答你的問題.He drank more wine than was good for him and got drunk
.He drank more wine than was good for him (他酒喝得太多,超出該喝的范圍)
than在你的句子里面是連接詞也是從句的主語,在我的句子里面也是如此.
結(jié)構(gòu)是：-- - -比較級 than 謂語（+其他成分） .
又如：
1 Here in my bedroom there are more books than are needed for my school work.
2 Every day I do more homework than is good for my health.
現(xiàn)在,你會了嗎?祝你學習天天向上.