英语:这句话有语法错误吗There have been attempts to modify the fiber chemically to resist abrasion enhancement.

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英语:这句话有语法错误吗There have been attempts to modify the fiber chemically to resist abrasion enhancement.

英语:这句话有语法错误吗There have been attempts to modify the fiber chemically to resist abrasion enhancement.
英语:这句话有语法错误吗
There have been attempts to modify the fiber chemically to resist abrasion enhancement.

英语:这句话有语法错误吗There have been attempts to modify the fiber chemically to resist abrasion enhancement.
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There have been attempts +carried out to modify the fiber chemically to resist abrasion enhancement.
There have been attempts +carried out to modify the fiber chemically to resist abrasion enhancement.
There have been attempts +existed for modifying the fiber chemically to resist abrasion enhancement.
读起来也更顺口

没有错误。这是there be句型的现在完成时态there have been。意思是“已经有过很多尝试去用化学手段改进纤维以增强抗磨损能力”。

你想表达什么意思?或者,你觉得哪里不确定?书里看到的 have been后不是要ing吗have been doing现在完成进行时,用它的时候用来表达感情色彩。如He has been playing computer games for six hours!他已经玩了六个小时的游戏了!
至于你疑惑的地方,真正涉及的是there be结构,所以加的是名词attempt,只是用了现在完成...

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