someone作主语时，后接动词的第三人称单数形式，例如：
1、You can google someone you've recently met to see what information is available about them on the Internet.你可以把最近见过的某人键入搜索引擎，看看在互联网上能查到什么相关信息。
2、There would be strong incentives to turn someone in.向警方举报某人将获重赏。
3、Someone might find out， and that would never do.也许有人会发现，那是绝对不行的。
someone作主语时，后接动词的第三人称单数形式。
例句：
Someone came out for a smoke.
有人为了吸烟而出来了。
Someone was beating at the door.
有人在打门。
Someone tapped at the door.
有人轻轻叩门。
Someone was beating a drum.
有人在敲鼓。
Someone was pounding at the door.
有人在砰砰地敲门。
Someone was ringing the doorbell.
有人在按门铃。
