在考虑记忆的进化及其所有可能的方面时，思考一下如果记忆不会消失会产生什么结果是很有用处的。 【析句】本句的主干是it is helpful to do sth.，真正的主语是to consider这个不定式，当然它里面还包含了一个带条件从句的宾语从句。逗号前面的是一个状语。

In thinking about the evolution of memory together with all its possible aspects, it is helpful to consider what would happen if memories failed to fade.

youdao

虽然这个功能很有用，但你可能会觉得它很烦。

While this is auseful feature, some of you might find it irritating.

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因此，你要写个英国小青年的故事，这个俚语单会很有用。它会让你的人物很逼真。

So if you're writing a story about young people in the U.K., this list of current slang could be helpful in creating a sense of verisimilitude with your characters.

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It seems that computer technology is vital in making visual effects. What if we didn't have it?

好像计算机技术对视觉特效很有用。要是没有这个我们会怎么样？

没有特效的话 - SpeakingMax英语口语达人

It will be useful and I think it also will show you that you are very smart.

这个句型非常有用，使用它也会让你显得很聪明。

It's like 课堂 - SpeakingMax英语口语达人