somebody：sb
something：sth
examination：exam
再问： yi si shi shen me
再答： 前后意思都一样。 somebody：sb 某个人 something：sth 某个东西 examination：exam 考试 请采纳
再问： yao geng duo
再答： i am: i'm :我是 is not: isn't 不是 you are =you're he is =he's she is=she's it is =it's They are =they're they were=they'er we are=we're we were=we'er I would=I'd you would=you'd He had=He'd I have=I've He has=He's 够了吗？
