1
be needful for sth
for表示用途
Food is needful for survival.
食物是生存所需的。
需要的；必要的；必需的
先理解核心含义，再看它在真实句子里的用法。
需要的；必要的；必需的
needed; necessary; essential
Food is needful for survival.
食物是生存所需的。
需要的；必要的；必需的；不可或缺的。
Needed; necessary; mandatory; requisite; indispensable.
The committee will provide all needful documents for the application.
委员会将提供申请所需的所有文件。
It is needful to check the facts before making a decision.
在做决定之前有必要核实事实。
The needful precautions have been taken to ensure safety.
为确保安全已采取必要的预防措施。
for表示用途
Food is needful for survival.
食物是生存所需的。
不定式作主语
It is needful to rest.
休息是必要的。
that从句
It is needful that we leave now.
我们现在离开是必要的。
Not this
The charity helps needful families.
Use this
The charity helps needy families.
混淆了'needful'和'needy'，前者意为'必要的'，后者意为'贫穷的'。此处表示贫穷的家庭应用'needy'。
Not this
Please do the needful.
Use this
Please do what is necessary.
将'needful'作名词使用是错误的，因为它是形容词。应改用'what is necessary'或'the necessary things'。
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Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
Use needful naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
常与介词 for 或 to 连用，表示'对……必要的'。
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY.