What is the first word you learn?这句句子对吗?为什麽

you learn 的时态不太对。
learn 应该是过去完成时
What is the first word you have leant?

对吗？
what is the first word.作宾语
you主语
learn谓语

what's the first word you have learnt?

对的把， 将句子还原后，就是，，
The first word you learn is what
句子是对的啊。。。
当然句子结构也就清楚了啊。。。