Hi everybody.  My name is Wil and I am posting for first time; I am Colombian and my native language is Spanish. 
I don't know how to identify the direct and the indirect object in a sentence, therefore I will be grateful if somebody can hel me with the following sentence:

Sentences grow from phrases to independent clauses.  

Somebody told me that:

Indirect object = to independent clauses
Direct object = sentences
Subject = phrases

but I am not very sure about this answer.

Thank you very much in advance

Wil