This change has no impact on the system's current beha. I think we should have used on instead: But ngram for impacted him vs impacted on him shows the version without on is much.
Breaking Bad Who Poisoned Brock at Blanca Wilkerson blog
Is the preposition in grammatical here?
Should it always take the preposition on or is it a matter of personal preference?
Purely aesthetically, i'd prefer impact on, although the transitive form is useful in the passive. My question is, should it be always followed by the preposition on? Nowadays, we often see the word impact being used as a verb. Oxford dictionaries gives the following example:
Impact 通常指“ 重大的影响 ”，名词，动词形式都有。 我们先来看 impact: This change has no impact in the system's current behaviour. Her speech made a profound impact on everyone. Is there a grammarians' consensus as to the usage of impact (as a verb)?
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