What we should do is to try to improve the exam system.

题目

What we should do is to try to improve the exam system.
这个语法好像不对哎、、首先为神马要加what,更重要的是、do是谓语为何在后面要加BE动词?谁帮我讨个说法啊、

答案

1.what we should do整体作主语 译为“我们应该做的”
陈述句形式为we should do things,作主语时,将things提前并变为what以引导全句
相当于the thing that we should do
2.is做谓语,与主语构成主谓关系
3.to try作宾语
4.to improve the examsystem作宾语补足语,用以具体解释“尝试”去做的事