关于英语完成时态问题We have an old musical instrument. It is called a

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关于英语完成时态问题
We have an old musical instrument. It is called a clavichord. It was made in Germany in 1681. Our　clavichord　is kept in the living room. It has belonged to our family for a long time. The instrument was bought by　my　grandfather many years ago. Recently it was damaged by a visitor. She tried to play jazz on it! She　struck the keys　too hard and two of the strings were broken. My father was shocked. Now we are not allowed to touch it.It is　being repaired by a friend of my father's.期中It has belonged to our family for a long time. The instrument was bought by　my　grandfather many years ago. 改成It belonged to our family for a long time. The instrument has bought by　my　grandfather many years ago. 这里的两个时态换了,我怎么看不出来有什么不一样?
第二个问题：怎么表达“我很多年以前就买了这本书了”

It has belonged to our family for a long time.
句末有“for+一段时间”的,前面要用完成时,改后的句子“It belonged to our family for a long time.”语法是错误的.
The instrument was bought by　my　grandfather many years ago.
句末为“...ago.”,前面用一般过去时,改后的句子“The instrument has bought by　my　grandfather many years ago.”也是语法错误.
我很多年以前就买了这本书了.
I bought this book many years ago.（偏向于强调“这本书”）
如果是强调“很多年以前”,就是：
I have bought this book for many years.

英语翻译We have an old musical instrument.It is called a clavich It is an instrument.If we have a cup,some rice or beans,some it is an instrument. if we have a cup,some rice or beans,som t is an instrument.If we have a cup,some rice or beans,some many parents think learning to play a musical instrument is 英语错题分析--急用 [ 标签：英语错题 ] A clock is an instrument.It tells the What is that?An old instrument.I_it in my grandpa's box.A.se 英语时态问题 "The guy was 70 years old.Could he have done it himse 英语词语musical instrument的中文谐音 can you play a musical instrument? we have ----(a an)autumn holiday ----(called calls calling)t What is that instrument called?