adverbs: where about?

[MarilenaG]

Sometimes I'm not sure where do I have to put adverbs in the sentence.
For example: "Doctor Smith took constantly part to research development."
do I have to put it between subject and verb? or in this case is it better to place it between "took" and "part"?

Thank you for your help

[Mister Micawber]

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Doctor Smith took part continuously in research development.
Doctor Smith continuously took part in research development.
Doctor Smith took part in research development continuously.

Adverb placement is generally near the verb, but different types of adverbs exhibit different degrees of freedom. Other factors also come into play, as here: 'take part' is a phrasal verb that is inseparable except by adjectives (e.g. 'took continuous part').
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Native English teacher at Mister Micawber's