How do I know when to you "to + V-ing" in English?

The following sentences are completely correct, could someone explain how grammatically correct? Or there are exceptions? For example, why not use "I look forward to see you" and "he admitted to take his money" instead?

  • The key to being more productive is

  • I look forward to seeing you.

  • He admitted to taking the money.

  • Scientists are closer to being able to...

  • Seven steps to reaching your goals!

  • 1
    Where is this rule found or formulated? It doesn't sound familiar right off the bat. May 8, 2015 at 1:09
  • Maybe the rule that I know is wrong, that is one of many things that I was taught when I studied. I believe there should be something that I do not understand in terms of grammar in the sentence like "Seven steps to reaching your goals!"
    – PaddyKim
    May 8, 2015 at 1:14
  • I don't know what to tell you; there's nothing wrong with any of these examples, and without a more specific rule to argue against it's basically just "no, somehow you misunderstood or were misinformed". May 8, 2015 at 1:17
  • I have edited the question.
    – PaddyKim
    May 8, 2015 at 1:27
  • See also: look forward to meet you, or to meeting you? May 8, 2015 at 5:21

1 Answer 1


I assume your confusion comes from failing to distinguish two different words spelled to.

The examples in your question aren't exceptions. They contain the preposition to:

The key [ to being more productive ] is ...
I look forward [ to seeing you ].
He admitted [ to taking the money ].
Scientists are closer [ to being able to ... ].
seven steps [ to reaching your goals ]

In each case, the -ing form of the verb is what is traditionally called a gerund. When the verb is in its gerund form, the clause as a whole functions very much like a noun phrase.

Each of the bracketed phrases is a preposition phrase.

This should be distinguished from the infinitive marker to:

I want [ to eat as many sandwiches as possible ].
I'd like [ to visit New York ].

In each of these examples, the bracketed portion is a to-infinitival clause.

The word to in these examples marks the clause as infinitive; the -ing form is not possible here.

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