人称代词的用法
人称代词在句中可以用作主语(用主格，如I, you, he, she, we, they, 等)和宾语(用宾格，如me, you, him, her, us, them等)：
He loves her, but she hates him. 他爱她，但她却讨厌他。
注：(1) 在口语中，当人称代词用作表语、用于than, as 之后或用于强调句中被强调时，可以用宾语：
“Who is it?” “It’s me.” “是谁呀?”“是我。”
He sings better than me. 他比我唱得好。
He is as tall as her. 他和她一样高。
It’s me who did it. 这是我干的。
但是，若than, as 后的人称代词后跟有动词，则必须用主格：
He sings better than I do. / He is as tall as she is.
(2) 单独使用的人称代词通常用宾格：
“I’m tired.” “Me too.” “我累了。”“我也累了。”
“Who wants this?” “Me.” “谁要这个?”“我要。”
(3) 有时用主格或宾格会导致意思的变化：
I like you better than he. 我比他更喜欢你。为I like you better than he likes you.之略。
I like you better than him. 我喜欢你胜过喜欢他。为I like you better than he likes him.之略。