when i finished _____ yesterday,it was 9 o'clock in the evening .A go shopping B go shop C going shopping D going shop

I ____ playing tennis when Tom and George arrived.为什么空格处是had finished 而不是finished? No sooner ____ finished my work ____ the boss come.A.had I,when B.I had,when C.had I,than D.I had,when Mary had finished her homework ____ the time I got home.A.until B.by C.at D.when Mary had finished her homework ____ the time I got home.A.until B.by C.aMary had finished her homework ____ the time I got home.A.untilB.by C.at D.when 【高中英语】请问这道题为什么不选A?Scarcely had I finished the work ____ I went home.A.before B.than C.as D.when when I finished school ,I want to be a teacher.前面finished为什么用过去式 Our class teacher turned away ____ I could give my reason for not having finished my work.A.before B.as C.when D.after为什么选A? When he finished his homework,my sister finished hers,too.(同义句转换) My sister finished herhomework___ ____ ____he finished his I want to know when ____ have a field trip We'll have it when all the work ____.A you are ,will finish B you will ,finishes C you will ,is finished D you ,finish when i have finished it.疑问这是是什么时态? She had finished writing the letter when I went in. when I am finished会错吗?为什么是am ,不是have? When I ___ on the TV,it had finished already. I finished ____(read) the book last night. A Can I go to zoo?B.when your.homework was finished/is finished 用所给单词正确形式填空1.i_____(keep) this book for two weeks 2.i have visited the old palace,really?when ____ you ____（visit） it?3.have you finished ____(read) the book? 英语翻译I have no idea when ____ ____ ____ ____ . 对于when I finished与when I have finished,用法有什么区别,或者说注意什么比如when I——this book,I'm going to sleep.为什么答案是have finished,finished不行吗？