I was go back china last month 和 I went back china last month 什么区别

题目

I was go back china last month 和 I went back china last month 什么区别
或者正确的应该怎么说?

答案

错误的,第一个错在：was+Ving.所以必须将go-going.再者两个句子语法上也不能这么说,也就是错的.必须：I went back to China last month.