We usually find "‘to"’ with a verb (as part of the infinitive form). However, when "to" is a preposition which is part of a combination ( phrasal verb, prepositional verb, idiom, adjective + preposition) , then it is correct to use a gerund after it. This list includes some of the most commonly used phrases containing the "to + gerund" formula. They will help you sound more natural.
The Concise Oxford English Dictionary and Thesaurus for Babylon
The Concise Oxford Dictionary The Oxford Dictionary contains over 78,000 headwords providing coverage of more than 240,000 words, phrases and meanings. This dictionary offers rich vocabulary coverage including rare and historical terms, as well as scientific and technical vocabulary, with hundreds of helpful notes on grammar and usage. The Concise Oxford Thesaurus The Oxford Thesaurus contains over 17,000 headwords offering more than 365,000 synonyms covering everyday vocabulary as well as more unusual and specialist words, with clear labeling of informal, dialect, literary, and technical items. The most useful alternative words are given first, with the word closest in meaning to the word given in capitals. http://englishtips.org/1150793437-the_concise_oxford_english_dictionary_and_thesauru.html