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Hello, everyone!

I would like to know which prepositions to use along each of the following verbs:

Collaborate/Aid/Cooperate/Assist

For example:

I am willing to collaborate/cooperate with the authorities on/in/with the investigation

I am willing to assist/aid the authorities on/in/with the investigation

As far as I can tell, in/on is used when it's followed by a verb, whereas with is used when it's followed by a noun.

P.S: I didn't list help because it's usually followed by with. Is it possible to use it alongside other propositions?

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Joaozinprepositions to use

According to what I've found on Google Ngrams, the usual combinations are these:

[assist / aid] (someone) with (something)
[assist / aid] (someone) [in / with] (doing something)
[cooperate / collaborate] with (someone) on (something)
[cooperate / collaborate] with (someone) [ in / on ] (doing something)

When a choice is shown, the preposition listed first is the more frequent one.

CJ

+1

I am willing to assist the authorities with / in the investigation.

Note: "with" and "in" are used with nearly equal frequency.

https://fraze.it/n_search.jsp?q=%22to+assist%22+investigation&l=0&t=0&ffo=false&findid=-1&ff=

You can use that link to explore other verb / preposition combinations.