对过去情况的虚拟你的句子是对的:
If I had had other alternatives,I wouldn't have been to Yunnan
If sb had done --- ,sb would/could/might/should have done
此句型用于 对过去情况的虚拟
对过去情况的虚拟你的句子是对的:
If I had had other alternatives,I wouldn't have been to Yunnan
If sb had done --- ,sb would/could/might/should have done
此句型用于 对过去情况的虚拟