请详细解释：i have entered for the examination but i don't want to take it.这句什么意思?

请详细解释：i have entered for the examination but i don't want to take it.这句什么意思? He paid for a seat when he _____ have entered free.(could /would / must / need)请解释 请选择并讲解He ___hardly ___the station when the train___A.had,entered ,had left B / ,entered ,left C .have ,entered ,left D.had ,entered ,left you seem to have learned all the English words by heart.回答是so I do 还是so I have,为什么不是so i have,请解释详细点,谢谢 I have to see the doctor because I ____ a lot lately.A. have been coughingB. had coughedC. coughedD. cough解释越详细越好!请解释D为什么错误 it is the best hotel that i have ever stayed in 这是什么句请详细解释为什么书中说是含定语从句的主从句 My life would have no meaning if i lose you 这句话语法有错吗?如果有错,请在语法上详细解释,Thanks! 请详细解释野狐禅. i can not stop smoking docter for your health i am afraid you A must B can c have to D may选have to还是must呀 请详细解释它们间的区别 i`m sorry to have disturbed you 改成 i`m sorry to disturb you行吗? 为啥要在sorry后加have呢……如题 请详细解释 英语翻译when　i　entered　the　room,tom　was　deep　in　his　novel.和when　i　have　entered　the　room,tom　was　deep　in　his　novel. 请各位前辈帮帮忙,you have made as many mistakes as i have .句中的i have 怎么解释 I have issue 有哪几种解释..请懂英语的帮帮我英语里有哪几种解释. The car ahead of me suddenly stopped by the roadside,I think it ___out of gas. 应该选A请详细解释.A.may run B.may have runC.must runD.should have runB是正确的，为什么呢 机械公敌 i robot英文 它的英文名为什么叫‘i,robot'请解释详细一点 I'd go with you on the trip , but I _ no time. A. have B.had C.have had D. had hadI'd go with you on the trip , but I _ no time. A. have B.had C.have had D. had had 请给一个详细的解释,谢谢 I have done the best i can.这是什么句?请详细说说这种句型! Since I entered the foreign language schoolI （have practiced） speaking English括号处是HAVE PRACTICED 还是 PRACTICE