someone后面加什么词

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。

Someone has taken my scarf.

有人把我的围巾拿走了。

I need someone to help me.

我需要有人帮我。