Please call the studtens back at once.the studtens 是宾语 back是

Please call the studtens back at once.the studtens 是宾语 back是 Please call the students back at once可以说明一下哪个是宾语和宾补吗 英语翻译at once修饰的是call,还是back.是做补语,还是状语? when father _ back,please tell him to call me at once.A.wll please call back 是什么意思 sit at the back of the back at the back in the back和at the back of；in the front和at the front of的区别是什 We sat at the back of the bus . 对划线部分提问 划线部分是：at the back of 是put back the clock还是put the clock back? at the back of用法 I should return the book back to the library at once.