I recommend to him that he asks his guide for more information about the museum because it is marvellous.
I recommend to him to ask his guide for more information about the museum because it is marvellous.
This one has me stumped.
I prefer the second form because the infinitive "to ask" or "that he ask" is more suitable than "he asks".
In both sentences, "marvelous" is mispelled and the main verb should preferably be in future or past tense, since the acts of recommending and writing about the recommendation cannot occur at the same time. (Unless you are multitasking on the internet, perhaps)
DrWLS is correct. The tense of the main verb is off; the second verb should be subjunctive, not an infinitive, and subjunctives have no singular form.
Here's a better form of the sentence:
I recommended to him that he ask his guide for more information about the museum because it is marvelous.
It seems that you are asking for an explanation or clarification of a given phrase. The phrase you provided is: "I recommend to him that he asks his guide for more information about the museum because it is marvelous."
This sentence suggests that the speaker is advising someone to seek additional information about a museum from their guide because it is considered to be marvelous. However, it seems to contain a grammatical error.
To correct this sentence, we can revise it as: "I recommend to him that he ask his guide for more information about the museum because it is marvelous."
Here, we use the subjunctive form "ask" instead of "asks" to maintain the correct verb tense and structure. The revised sentence now conveys the same meaning, advising the person to consult their guide for more information about the wonderful museum.