要看句子,因为实际上,宾格和主格都可以,比较起来,宾格更常用,
更加口语化
例1:He works more carefully than I.(极少用)
He works more carefully than me.(更常用)
使用主格的时候,加上 助动词的形式更为常用,
例2:He works more carefully than I do.(比直接用I更好)
以上几种结构表达完全相同的意思
但是,如果than所表达的[比较]容易造成混淆,那么无论是不是正式文体,
都应该选用合适的形式,
试比较:He talks more about Mary than me.
(他谈论Mary较多,谈论我比较少)
He talks more about Mary than I do.
(他比我更喜欢谈论Mary)
人称宾格：I love you more than him.意思是：我爱你胜过爱他.
him带入前面时作宾语.（I love you/I love him)
人称代词：He is taller than I.意思是：他比我高.
I带入前面作主语（He is tall/I am tall)更准确地说,
这句句子应为He is taller than I am.
但现在书面语中也可以把am省略.
在口语中也可以这样用：He is taller than me.