What should I (buy) for her tenth birthday

问题描述:

What should I (buy) for her tenth birthday
是用所给词的适当形式填空
I 后面是填空的地方
What should I (buy) for her tenth birthday

buy
前面有情态动词should,后面接动词原形.那再问一下,为什么不用get所给的单词是buy,怎么能用另外一个不相干的单词了?