when your homework is finished,you may go out to play.为什么用 is finished?涉及到哪些语法?不是要翻译，是要语法解释为什么用is finished

when do your homework When ( ) you ( ) your homework?(finish) when I finish () my homework A Can I go to zoo?B.when your.homework was finished/is finished i will finish homework when i------(leave) when did you do your homework?改为被动语态 when ____ your homework ___? when you doing your homework 跟when doing your homework 有什么区别 when i looking your when i looking your when do your friends what to come这句话对吗i'm doing one's my homework 这句话呢 I want you your homework first I am doing your homework.的意思 Can I help you for your homework? -Don't leave your books on the desk when you finish you homework.-______.A.yes,I will B.yes,I doC.No,I don't. when you did do homework your连词成句 改错 Do be careful when do your homework when did you do your homework yesterday?怎么回答?急--- 连词成句：will,finish,you,your,when,homework