Impact 通常指“ 重大的影响 ”，名词，动词形式都有。 我们先来看 impact: Is the preposition in grammatical here? Impact (early 17th century) comes from the past form of the same source.
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My question is, should it be always followed by the preposition on?
Oxford dictionaries gives the following example: Purely aesthetically, i'd prefer impact on, although the transitive form is useful in the passive. But ngram for impacted him vs impacted on him shows the version without on is much. This change has no impact on the system's current beha.
Her speech made a profound impact on everyone. Should it always take the preposition on or is it a matter of personal preference? I think we should have used on instead: This change has no impact in the system's current behaviour.
Is there a grammarians' consensus as to the usage of impact (as a verb)?
