http://www.englishforums.com/search/pro.htm?q=tag%3aGerunds+tag%3aPresent+tenses+tag%3aExpressionsSearch results for 'tag:Gerunds tag:Present tenses tag:Expressions' matching tags 'Gerunds', 'Present tenses', and 'Expressions'en-USCSMOD (Build: 3273.32735)http://www.englishforums.com/English/DifferenceBetweenMeaningThese-SentencesUsedPlayCricket/vbpwr/post.htm#343468Sun, 25 Mar 2007 23:23:52 GMT946f00bb-57d3-4b7b-a9a2-059b5341af52:343468jeka Yankee wrote Jackson6612 wrote Question 2 Both Philip and Yankee said I am used to playing cricket in my spare time I was told that after to simple Present Tense form is used but playing is not simple Present Tense form of play What would you say on this Most of the time you will find the base form infinitive of the verb after the word to However certain expressions require the ing form Some examples of these are be used to doing be accustomed to doing look forward to doing admit to doing object to doing As far as I know to is a preposition here it is not a part of infinitive So you cannot use anything else after a preposition but a noun or gerund ing form Hope it helps http://www.englishforums.com/English/IHaveToGoNow/vgxq/post.htm#21640Fri, 06 Feb 2004 13:47:38 GMT946f00bb-57d3-4b7b-a9a2-059b5341af52:21640pemmicanJust change it into I must go then it s easier to analyze go here is the full verb that is in its infinitive and follows the modal auxiliary must without to I have to go have to is the substitute form for must go again is the full verb in its infinitive Have to here is a fixed expression and therefore to is actually part of the following infinitive form of the full verb not a preposition If it was a preposition usually a Gerund would have to follow as eg in I look forward to seeing you To complete the analysis I is the subject of the sentence it s a personal pronoun have to go is the predicate of the sentence which includes the inflected present tense form of have and the infinitive form of the full verb with to now is an adverbial of time Hope that helped