many years had gone by before i saw her again.by在这个句里子怎么解释?

many years had gone by before i saw her again.by在这个句里子怎么解释? How many times ____ you ____the Great Wall?--Only once.I____there three years ago.A.did;go to;have gone B.had;gone to ;went C.have;been to ;went D.have;been to;have gone how many times ____you____the Geart wall Wall?once i____there three years agoA did,go to,have gone B had,gone to,wentC have,been to,have gone D have,been to,went i've been gone for so many years之中的 have been gone It had been many years since my wife and I had gone dancing it + 过去完成时 + since + 例句：it + 过去完成时 + since + 过去完成时为什么不是it + 过去完成时 + since + 过去式?真的是it + 过去完成时 + since + 过去 He had been killed __________.A.many years agoB.many years before为啥子? the dream he had had for so many years ended there.为什么两个had呢? Yet two years had gone by and I was not that much worse.that 语法17-19Shanghai has ____ many changes in different fields these years.A.gone out B.gone through C.gone on D.one into Many people believe everything or almost everything they read in newspapers or hear on radio.A few years ago I 36 a story about a husband and wife who made a 37 mistake.They had gone shopping and had taken their small baby 38 with them.After they had 找出错误并改正1.i have brought the piano for six years.2.-where have you gone?-I've gone to school.3.how many pages have read by the end of last year?4.whine i walked in the street,i saw my teach.5.they have had their lunch at twelve.6.the wor 英语翻译I have gone to many places where I had never been . many.Years. the dream he had had for many years ended there.句子成分分析. I have had it for so many years 这里的谓语是have had吗 In the past several years,i had many chances to inspect many places of China How many times ____ you _____to Beijing this year?Three times.A.have,gone b.have been c.had,gone d.had,been The dream he had had for so many years ended there这里的两个had各自表示什么意思