Question

帮忙看一下这两个个句子的语法错误。谢谢！

He is well-done both in Violin making and Violin playing,
has been sent to Italy to investigate and study.
Not only does she do well in Violin making,she also participated
in master classes to learn Violin restoration.

Answer 1

很高兴为你解答！以下是正确的句子：

1）He does well both in Violin making and Violin playing,
so he has been sent to Italy to investigate and study.
2）Not only does she do well in Violin making but also she  participates 

in mastering classes to learn Violin restoration.

希望对你有所帮助。学习进步、快乐，宝贝！

Answer 2

第一个句子：前面是一个完整的句子，要和后面连起来需要加连接词或者 改成主语从句 He who is well-done both in Violin making and Violin playing has been sent to Italy to investigate and study.
第二个句子not only....but also 使用错误，前面句首否定且接句子时倒装没问题，后面改成 but also she ......另外就这句的意思来讲，个人觉得此处not only...but also 的使用至少是不妥的，不恰当的。

Answer 3

violin 不要大写。 do well 不适合这样用。可考虑改成 he is skilled in violin making. 第一句可以用 and has been sent...
第二句应该是 she has also particiated...