The word “to” is often confusing in English. It can be used as part of a modal expression, infinitive or as a preposition. Note the usage of “to” in the following sentences.
| To V I used to live in Utah. I am supposed to go. I hope to see you. | To V ing I am used to living in Utah. I am opposed to going. I look forward to seeing you. |
Modal expressions are always followed by the base form of the verb.
| ought to have to have got to used to | be to be able to be supposed to be going to |
Similar expressions are followed by infinitives (to + V)
| need to V want to V hope to V happen to V mean to V tend to V care to V wish to V would like to V | be allowed to V be inclined to V be reluctant to V be willing to V be happy to V be afraid to V be required to V be delighted to V be compelled to V |
Many prepositional combinations using “to” are followed by gerunds.
| look forward to V ing resort to V ing submit to V ing confess to V ing give in to V ing admit to V ing with regards to V ing | be accustomed to V ing be addicted to V ing be opposed to V ing be limited to V ing be dedicated to V ing be commited to V ing be used to V ing |