1. You must draw a horizontal line that represents the whole sentence, something like this:
______________________________
2. Then draw a vertical line at the middle of the previous one to divide the subject of the predicate.
________________|____________________
subject verb
3. Articles and adjectives that are related with the subject must be written in diagonal lines starting from the horizontal line of the subject.
4. Direct and indirect objects are part of the predicate, so they go beside the verb.
5. Any kind of adverbs are also placed in diagonal lines but starting from the horizontal line of the verb.
For example:
The big boy won triumphantly the game.