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题库 / Prep2007E1-SC-141
The federal rules aimed at protecting human subjects of medical experiments were established to ensure that patients must be warned of potential risks and an independent panel would evaluate the experiment before it was conducted.
must be warned of potential risks and an independent panel would
must be warned of potential risks and that an independent panel
are warned about potential risks and that an independent panel
will be warned about potential risks and an independent panel would
would be warned of potential risks and that an independent panel would
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在过去的时态描述将要发生的事情要用would
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Idiom: ENSURE---
#RIGHT: He ensures that ddls are met (or will be met).
#WRONG: He ensures that ddls must be met (or should be met).
"ensure"&"must"语意重复，含命令语气的动词，后面一定用动词原型，同理还有demand, dictate(命令), insist, mandate(命令,授权), propose, recommend, request(要求), stipulate(规定), suggest(建议)
2. 平行
3. Ensure 和 Must语义重复
因为主句的谓语动词were established 已经限定发生在过去，从句中的谓语动词也要补出助动词would
ensure sth，The book ensured his success.；ensure (that)+宾语从句，Ensure the guard is in place.
2. ensure 和 must语义重复
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