infinitively

/ɪnˈfɪnɪtɪvli/
adverb
  1. In a way that relates to or uses an infinitive verb form.
    • The sentence was structured infinitively, with a long chain of 'to' verbs.
    • He spoke infinitively, using 'to be' and 'to have' in every clause.
    • The teacher explained how to use the verb infinitively in a sentence.