For the word speed, for example, a past-tense change from sped to speeded may have been accelerated by a shift in the word's meaning from "to move rapidly" towards "to exceed the speed limit."

例如speed，它的过去式从sped变为speeded，这可能是因为该单词的意义由“快速移动”到“加速”的转变。

youdao

This normally happens when the past events have some present importance, and when we could make a present tense sentence (with a similar meaning) about the same situation.

常见于过去的事件对现在来说是重要的，以及可以用现在时态的句子(意思相近)谈论相同的状态。

youdao

This normally happens when the past events have some present importance, and whenever we could make a present tense sentence (with a similar meaning) a comparequipped situ.

常见于过去的事件对现在来说是严重的，以及可以用现在时态的句子（意见意义相近）谈论相同的状态。

youdao