someone 后面是跟is还是are

也有复数.are.表示一类人时
Someone have do it.
已经有人做了.
someone to whom private matters are confided.
一个可以对其倾吐心事的人.
Stop someone who are making an unpleasant loud noise.
停止某人的大声喧哗.
根据语境表示一个人的情况--
Someone has been putting rumours about that we are leaving soon.
有人散布谣言说我们就要走了.
someone who believes that God and the universe are the same.
认为上帝和宇宙万物是相同的人.
Someone is always setting stories about that some workers are to be dismissed.
有人总在散布谣言说有些工人要被开除.
总结：someone后即可加is,又可加are,根据句子中的语境指的是一个人,还是一类人

is

是is

当然是is 啦
Someone is singing in the garden.

is
I think someone is out there.

some is