seem to do正确。例如：She took me on as her personal assistant but all I seem to do is fetch and carry for her.她雇佣我为她的私人助理，但我似乎要做的一切是替她打杂。
seem的用法
1、seem(系动词）+形容词
eg:He seems very angry.他好像十分生气
2、seem+名词
eg:He seems a nice man.他看起来是个好人
3、seem like.意为“好像，似乎”
eg:It seemed like not a bad idea at the time.当时这主意好像不错
4、seem to do sth 意为“似乎”
eg:I seem to have left my book at home.我大概是把书忘在家里了
5、It seems that+从句 意为“看起来好像.”
eg:It seemed that he was very happy.他看上去好像很高兴
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