翻译为 你可以尝试把疑问句还原为肯定句比如“他在这家工厂工作吗？”
“Does he work in the factory?"这里does 就不能换成 “is”
因为换成 is
你再把句子还原 就变成了he is work in the factory这很明显就不对所以可以总结为 原句有be 动词时变疑问句把be动词提前 如果没有be动词 就要借助 助动词 如 do does did 等...
应该是be动词吧，这时be是一个连系动词，用于指出名称，日期，位置或进行描述，例Where is Sara? He is a teacher. Today is March 18th. 助动词就是do, 与另一动词连用，构成一般疑问句或否定句，例Do you have a pen pal? I don't like eating fish. 希望对你有帮助...
