句子结构After having had half a year's practice,in the last month of which no improvement had been made,I decided to make another attempt这里的in the last month of which no improvement had been made到底是宾语从句还是定于从句which在其中各充当什么成分如果是宾语从句which充当从句的主语，这句话我理解不能啊难道no improvement had been made不是一个完整的句子？
问题描述：
句子结构
After having had half a year's practice,in the last month of which no improvement had been made,I decided to make another attempt
这里的in the last month of which no improvement had been made到底是宾语从句还是定于从句
which在其中各充当什么成分
如果是宾语从句which充当从句的主语，这句话我理解不能啊
难道no improvement had been made不是一个完整的句子？
答
宾语从句,which是从局的主语,定语从句一定要有something,然后形容something
答
in the last month of which no improvement had been made既不是宾语从句，也不是定语从句，而是插入语。其特点是前后都用逗号分开。
答
of which,定语从句,修饰的是half year's practice,相当于that
意思是说,半年练习的最后一个月,一点进步都没有,所以我决定另作尝试