Nowadays, we often see the word impact being used as a verb. But ngram for impacted him vs impacted on him shows the version without on is much. Is the preposition in grammatical here?
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Impact 通常指“ 重大的影响 ”，名词，动词形式都有。 我们先来看 impact:
The use of impact as a verb to indicate greater effect seems to have come into use in the 1960s. My question is, should it be always followed by the preposition on? Impact (early 17th century) comes from the past form of the same source. Is there a grammarians' consensus as to the usage of impact (as a verb)?
This change has no impact on the system's current beha. I think we should have used on instead: This change has no impact in the system's current behaviour. Oxford dictionaries gives the following example:
Her speech made a profound impact on everyone.
