糊涂鬼的英文：
someone who often seems confused and/or stupid

someone是什么意思：
pron. 有人，某人
n. 重要人物，有名气的人

Someone has tampered with the accounts of the company.
有人篡改了公司的账目。

Someone has tampered with the electrical circuits.
有人乱动过电路。

Someone left this for you.
有人把这留给你。

who是什么意思：
pron. 谁；他，她，他们，她们

Who the heck are you?
你究竟是谁？

Who is knocking the door || Who is knocking || Who is at the door || Who is knocking at the door?
谁在敲门

Who is knocking the door / Who is knocking / Who is at the door / Who is knocking at the door?
谁在敲门

often是什么意思：
adv. 时常，常常；往往，通常

They often gossiped.
They often gossiped.

Often the good suffer, and often the wicked prosper.
好人总是受气遭殃，坏人往往青云直上。

She often keeps a diary.
她常记日记。