语法svo when doing.doing修饰主语还是宾语?a为什么错?或者说没有e好?

语法svo when doing.doing修饰主语还是宾语?a为什么错?或者说没有e好? SAT语法 关于SVO,doing/done 和SVO done/doing Our modern solar calendar,established in 1582,is based on the J.Calendar,introduced by JC.实际上这道题考的是平行结构！ (if/when/because+主语)+doing.相同主语.这个是什么语法? when 后面直接+doing 或者+ did 是什么语法现象? when 后面直接+doing 或者+ did 是什么语法现象? What did you see (her doing) when you got there?括号里填her doing的语法是什么啊? SAT关于语法SVO,doing的问题The Pony Express was an ingenious system for carrying mail; it was in existence only briefly,however, before the telegraph system made it obsolete.引号部分为画线部分A.mail; it was in existence only briefly, be doing sth.when when do we have to be doing the research?有谁能解释一下这个句子的语法吗?特别是be doing这里 是什么时态? 这句英语的语法问题All he had to do was spend four months this year and next year in Moscow,a nice enough city,doing some research—which he would have done anyway at home at UCLA.为什么这里要用would have done?可以用would 还有doi 语法：They have long tails for keeping balance when climbing the tree.When doing?为何省略they are 什么情况下可以省略 he often paly the computer when i'm doing my home work语法对吗还是he often paly the computer when i do my homework 可不可以用be doing,when be doing? DOI information when doing sth 还是 when do sth (语法问题)这句话：we consider it as constant when computing the signal to noise ratio.还是we consider it as constant when compute the signal to noise ratio when+doing 还是when+to do sth. when i do还是when i doing what l am doing right now语法