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I recommend you to define those parameters beforehand.
I recommend that you define those parameters beforehand.

Are both sentences grammatically correct? If yes, do they mean the same thing? If yes, which one should I use?

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Is "recommend you to" possibly British English? It is incorrect in American English. – user142639 Oct 14 '15 at 5:35
up vote 6 down vote accepted

The following variant is correct:

I recommend that you define those parameters beforehand.

You can also omit the word that, giving the following:

I recommend you define those parameters beforehand.

However, the variant with to is incorrect. The verb recommend always takes either a noun object or a subordinate clause as a complement, never an infinitive.

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Got it. Thanks :) – Šime Vidas Jul 28 '11 at 16:11

Actually I believe that both variants can be technically correct, but they are saying very different things, and using the "you to" variant is mostly done as a mistake where "that you" would have been correct.

I recommend that you define those parameters beforehand -> my recommendation (to you) is that those parameters should be defined beforehand.

I recommend you to define those parameters beforehand -> my recommendation (to some other currently unspecified person) is that you are the person best-suited to the task of defining those parameters beforehand.

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+1: Nice point. – Peter Shor Jul 28 '11 at 16:44
Wow. Great. A nice way to make one understand why "to" is a bit weird there. – CopperKettle Nov 27 '14 at 12:14
Hellion, pls reply to lenks' Oxford example. – Louis Liu Jul 22 '15 at 7:43

I think both are correct:


recommend somebody to do something We'd recommend you to book your flight early.

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Could you expand what you are saying with examples and explanations. That's kind of the point english.se – virmaior Feb 5 '14 at 0:46
very good. I always have questions about that. Contrary to Hellion's answer. Surprised to see that Oxford has an example of "recommend xx to do xxx". – Louis Liu Jul 22 '15 at 7:40

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