she is back与she is a back 的区别

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she is back与she is a back 的区别
she is back与she is a back 的区别

she is back与she is a back 的区别
she is back是她回来了
back做名词名词 n.
1.背脊,背部[C]
Someone patted me on the back.
有人在我背上轻轻地拍了一下.
2.后部[the S][(+of)]
Grandpa and grandma sat in the back of the car.
爷爷和奶奶坐在汽车后排的座位上.
3.后面,背面[the S][(+of)]
4.椅背[the S] [(+of)]
5.(书报等的)末尾[the S][(+of)]
There is an appendix at the back of the book.
该书末尾处有一附录.
6.(足球等的)后卫;后卫球员[C][U]
she is a back是 她是后卫球员 back应是后卫的意思

she is back 表示“她回来了” 动词
she is a back 表示“她是个后卫” 名词
英语学习可以到“趣味英语网(zhishibar)”

she is back中back做动词
she is a back中back做名词