used to

modv.	1. used for saying what was true or what happened regularly in the past, especially when you want to emphasize that this is not true or does not happen now
adj.	1. familiar with something because you have often experienced it before, so it no longer seems difficult or strange

1.	过去常常三星笔试词汇表来源_百度文库 ... hearfrom 收到…的来信 5. usedto 过去常常 6. giveup 放弃 7. ... wenku.baidu.com\|Based on 9 pages
2.	过去经常基础知识之重点词组--搜狐博客... ... 67. throwaway 抛却；丢掉；扔掉 70. usedto 过去经常；以前常常 71. waitfor 等候;等待 ... bjezfxenglish.blog.sohu.com\|Based on 8 pages
3.	的用法归纳 Used to的用法_百度文库 ... used_to 用法详解 usedto 的用法归纳 Used to 的用法 ... wenku.baidu.com\|Based on 4 pages