(1) everyone意为“每个人，大家”(=everybody)；every one通常用来指事物，而不指人。

• I would like everyone to be happy.
  我希望每个人都幸福。
• She took my bottles of whisky and emptied every one down the sink.
  她拿走我的威士忌，并把每一瓶的酒都倒在洗涤槽里了。

 (2) 但every one of后可接事物，也可以接人。

• Go to bed, every one of you.
  你们每个人都给我睡觉去。
• Every one of the rooms was occupied.
  每一个房间都住满了人。