how long did you write to your e-friend yesterday?译

How long ago did you start school? how,spend,did,there,long,you(?) How long did you stay there? how long did you ____ it how long did you stay in Beijing? how long did you stay there?能否改为 how long did you stay at there? How long did you Spend (do) your homeHow long did you Spend (do) your homework how long haveyoubeen和how long did you skate?有什么区别?how long haveyoubeen和 how long did you skate?有什么区别? How long have you been skating?与How long did you skate?的区别 how long ago did you start school?怎么回答? How long did you stay there? 应该怎么回答 英语改错“How long did you find it? How long did you spend ---(do)sport yesterday? how long完成时how long不是问一段时间的吗?为什么可以用How long did you stay? how long haveyoubeen和how long did you skate?什么区别? How long did you sleep为什么用did ,不能用were you sleeping 或 asleep. 这五句句子有没有语法错误?1.How long did it take for the writer to find the articles in the library?2.Finally,how many articles did the writer find?3.What did the writer need to do after she finished her research?4.What happened to the wri -how/when /where/how long did you guess?-the way you speak.哪一个,是什么意思