作业帮need的过去式还是need吗
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/09 08:08:33
need的过去式还是need吗
need的过去式还是need吗
need的过去式还是need吗
是
need做情态动词时没有时态的变化,过去式也是need.后面接动词原形.如：
I need write a letter yesterday.
Need he answer it then?
Yes, he need.
No, he needn't.
情态动词need表示对过去的推测时常和现在完成时连用.如：
You needn't have hurried.你当时不必这么匆忙.
need做实义动词（行为动词）时,过去式是needed.后面接to do.如：
I needed to write a letter yesterday.
Did he need to answer it then?
Yes, he did.
No, he didn't.
不对
needed
1. He succeeded in eliciting the information he needed from her.
他从她那里问出了他所需要的信息。
2. What implements are needed for gardening?
园艺需要些什么工具？
3. I underestimated ...
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不对
needed
1. He succeeded in eliciting the information he needed from her.
他从她那里问出了他所需要的信息。
2. What implements are needed for gardening?
园艺需要些什么工具？
3. I underestimated the time we needed by 30%.
我把我们需要的时间低估了30%。
4. Irrigation is needed to make crops grow in dry regions.
干旱地区需要灌溉才能使作物生长。
5. A number of cables are needed in this project.
这项工程需要大量电缆。
收起
needed
need 既可以做情态动词也可以做一般的动词。
当它做情态动词时，没有人称和时态的变化，所以一直是need+do。
当它做一般动词时，过去式就是needed，后接to do。
是的，就是need
有这种可能，也有是needed的情况。