用be used as 和 be used by 填空English _____ a foreign language in China.Rubbers _____ the students to correct mistakes.

be used to和be use to 请具体解释、分析、区别 :be used for ; be used as ; use to.请具体解释、分析、区别 :be used for ; be used as ; use to. be used to do 和be use for doing区别参考一下句子（绝对正确的）：bread is used asor food ,is not used to play with .能不能用be used to be a toy?为什么前面的就要用be use for ,后面不用?不要扯use的其他用法,就 be used as 和 be used by 区别 use to be和 used to be 有什么区别 都怎么分别用啊? 如何用（请用）used to do sth 和used be+adj和be use如何用（请用）used to do sth 和used be+adj和be used to doing sth.造句（分开造句） be used for 和used as的区别 used to和be use to 加do还是doing use to 和 be used to的详细用法? use to 和used to的意思 be use to 和be used to do有区别吗? be used for doing,be used to do,be used as,be used in,be used to doing,used to 英语翻译be used as to? electrical 和electronic区别be used for和be used as有什么区别 use to,be used to do,be used to doing和be used for的区别used to 是过去常常吧 be used for 和be used as 用法上的区别是什么? be used in和be used as的区别 （英语） USED TO的用法Mobile phone are not so expensive as they_____to be A,are used B,were used C.use D,used 他们不是被使用吗?应该用A呀,为什么选D呀 Be used as 与be used for 有什么区别?