He added some words to explain his idea.为什么不用add面用added

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He added some words to explain his idea.为什么不用add面用added

He added some words to explain his idea.为什么不用add面用added
He added some words to explain his idea.为什么不用add面用added

He added some words to explain his idea.为什么不用add面用added
He added some words to explain his idea 他补充了一些语言来解析他的想法.
从这句话的意思可以知道,他已经做了这事——补充了语言来解析他的想法,是过去时了.所以要用add的过去式added.

因为这件事发生在过去,所以用过去式added。

因为是已经发生过的事,而现在是陈述,所以用过去式。
如果硬要用一般现在时,也该用第三人称单数形式的adds。
时态的变化很容易入门,但很难全部掌握呢。