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。