To + plain form occurs when the subordinator to marks to -infinitival clauses, as in I want to see them . To + · ing form occurs when to is a preposition taking a gerund-participle clause as complement, as in They're opposed to selling the land. Selling is not a noun but a verb heading an expression that is functionally similar to a noun: violence , for example, could replace selling the land .
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.