Infinitive "To" = to + base verb . Preposition "To" = to + Noun, Pronoun, V+ing . Examples of Infinitive "To" are: would like to + base verb . plan to + base verb . decide to + base verb . etc. Examples of Preposition "To" are: go to + Noun . look forward to + Noun/ V+ing. be used to + Noun/ V+ing . allergic to + Noun . etc. Hope this helped! ;-) More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.