闲话少叙，直接上句子：
You need some time all alone,of which I'm sure will be a great help.
这句话定语从句是否错了? 假如错，错到哪儿了。我实在弄不懂，谢谢老师了！要如何改呢
定语从句错误。删去介词of。which I‘m sure will be a great help 为嵌入式定语从句，which指代some time all alone, 并在 I’m sure后的that从句中做主语。连词that需要省略。
You need some time all alone, which I'm sure will be a great help.
或者这个句子可以改为：You need some time all alone, of which I'm sure. 此时which指代前面整个主句内容，of which介词短语为表语形容词sure的补足语。
