人稱代詞既可用主格也可用賓格的情形
1. 用于動詞be 后面作表語時，人稱代詞既可用主格也可用賓格。通常說來，在正式文體中多用主格，在口語或非正式文體中多用賓語。如：
It's I (he, she). 是我（他、她）。（正式）
It's me (him, her). 是我（他、她）。（非正式）
2. 當(dāng)人稱代詞用于than和as之后時，既可用主格也可用賓格。如果將than, as看作連詞，則后面用主格；如果將than, as看作介詞，則后面接賓格。由于在口語中，人們常將than, as視為介詞，所以在口語或非正式文體中，多用賓語。如：
She is quicker at figures than me. 她在計數(shù)方面比我要快。
She is quicker at figures than I. 她在計數(shù)方面比我要快。
You've got the same idea as me. 你的想法跟我一樣。
You've got the same idea as I. 你的想法跟我一樣。
She was wearing the very same shoes as me. 他與我穿的鞋子完全一樣。
She was wearing the very same shoes as I. 他與我穿的鞋子完全一樣。
注意，若在than, as后的人稱代詞后接有謂語動詞，則必須要用主格。如：
I'm not as clever as he is. 我沒有他聰明。
He will see you as soon as he can. 他會盡快來看你。
He eats more quickly than I do. 他比我吃得快。
Just because they make more money than I do, they think they're superior. 只是由于他們掙錢比我多，他們就認(rèn)為比我優(yōu)越。
3. nobody but me這類表達(dá)用作主語時，but后的人稱代詞用主格或賓語均可以。若將but視為連詞，則其后用主格；若將but視為介詞，則其后接賓格。如：
Nobody but she has seen it. 除了她之外，沒有人見過它。
Everybody but me has a computer. 除我外每人都電腦。