谁来教我这句语法Attemps had been made by others to classify plant species into groups,but the breakthrough came with the work of Carl Linnaeus.主要Attemps为什么在开头

谁来教我这句语法Attemps had been made by others to classify plant species into groups,but the breakthrough came with the work of Carl Linnaeus.主要Attemps为什么在开头 请分析这句英语的语法The cave might never have been discovered had not the entrance been spotted by the distinguished French potholer,Berger请分析这句话的语法,中文意思我知道,关键是什么语法结构. I hope you had the time of your life. 中的had能换成have吗?这句英文里的had为什么不用have ,从语法上来帮我分析分析啊! i haven't had mango,have you ?我没吃过芒果,你吃过吗?这句英文语法正确吗? Work on it had begun before my sister left.这句语法讲解下,有点迷糊. what do you think had happened to him. 这句话在语法上怎么用句 what had happened happened again,这句语法对么,或者怎样改, I have already had lunch.--为什么在already前要加have,下面不行吗?I already had lunch,--这句是不是语法不对啊,本人语法忘的差不多了.I have already had lunch.--------------------------现在完成时,不用加already也 请分析这句英文语法布莱里奥从1905年起便开始研制飞机Bleriot had been making planes since 1905为什么不是Bleriot had made planes since 1905 If I had leisure ,I often would you want your game here.这句错在哪里?还有这句I have heard that when you miss?我说句子问题不是语法,而是句子不太顺?你们觉得呢? 帮我看看这句什么意思,语法有错误吗?The driver is the man from whose room she had stolen the gold watch介词加定语从句，那个from 是多余的吗? When You're Gone 这句语法对么?这句语法对么? 帮我分析下VV的歌 请解释一下这段英语句子的语法?plans for revolution that had long been incubating in their minds 上面这句句子,关于had been incubating这一段的语法? When I went to see Mrs.Smith last week,I was told she had left two days before当我上周去拜访史密斯的时候,我已经在动身前两天告诉她了.I was told she had left two days before.这句的语法点不是很明白,I was told she是 看看这句语法 时态有没有问题When the prey had discovered the puma,it had been already attacked by t改为 When the prey discovered the puma,it had been already attacked by the puma.呢 为什么这句话可以这样写呢?请问为什么下面 A 这句话可以这样写呢?有什么语法依据吗?原句是不是像我写在下面 B 的那样呢?A)Drew,the guy I had had a crush on for almost a year,was taking me out on a date!B)I h [英语]不知道这到底啥语法结构 ,she should be compensated for the suffering she had been caused,其中she had been caused我知道是形容suffering的 但是不知道这到底啥语法结构 , 请帮我分析下这句的语法i will make no such promise.没明白这句的语法