INFINITIVE

Infinitive is basic verbs in English.
Infinitive can be expressed by using the infinitive "to" known as to infinitive and the infinitive without to is known as the bare infinitive.
A. The use of "To Infinitive"
   1. As Subject
       example : to learn, Ex : for student of university is must.
   2. As Object
       example : his plan is to keep the affair secret
   3. Occupies its place relative pronoun or phrase
       a. As Subject
          example : I have no one to help me
                         (I have no one who can help me)
       b. As Object
          example : I have nothing to do
                         (I have nothing that I must do)