Beingphysicallyexaminedforfreetwiceayeariswhateveryclerk()beensuredinanycompanyofthestate.为什么填shall而不填oughtto?

Question

Being physically examined for free twice a year is what every clerk()be ensured in any company of
the state.为什么填shall而不填ought to?

Answer 1

这个句子比较长,首先分析一下句子结构.
【Being physically examined for free twice a year 】主语
【is】谓语
【what every clerk shall be ensured】表语从句
【 in any company of the state.】状语
意思是：每两年免费做一次身体体检,是这个州的公司应该对职员做出的保证.
should 强调主观看法,而 ought to 强调客观要求
这里是而客观地,不是谁主观能改变的.