there used to be 与there was (were)有什么不同?there used to be与there was (were)有什么不同?都是there be 的过去形式吗?There used to be a lot of old walls in Beijing.的反意疑问句是什么?

there used to be a reastrant here 与there used to be here a reastrant哪个对 there used to be a reastaurant here 与there used to be here a reastaurant哪个对 be used to与have used to there used to be的意思!RT, 请问 There used to be a park. be used for与be used to的区别 used to与be used to的用法区别? used to 与 used to be 的区别用法 used to 与 be used to 的区别,并造句 be used to doing与used to do的区别 used to与be used to的用法及区别 used to 与 be used to 的区别?如题 used to 与be used to的区别 ______ plenty of water in this river.A.There used to being B.there used to beC.There is used to beingD.There was used to be didn‘t be 与weren't有什么区别The foreigners （）there ,But they （）the food there at first A.used to live ,didn‘t be used to B.used to live ,weren't used to C.are used to living ,didn‘t use to D.used to living ,usedn't to There used to be a clean river.为什么不是There used to have a clean river there used to be 与there was (were)有什么不同?there used to be与there was (were)有什么不同?都是there be 的过去形式吗?There used to be a lot of old walls in Beijing.的反意疑问句是什么? -------- a small book store in thistown.( they used to be ,it used to have ,there used to be ,there used to have)