Here are some resources for learning more about and practicing the use of infinitive phrases (along with gerunds and participial phrases) 1) Perdue Online Writing Lab -  Excellent information resource.  The examples and explanations here are clear. (no exercise)...

Here is the information from the board on combining sentences:   sentence combining screen-shots.doc (194 kB)  

Adjective Phrases are prepositional or participial phrases used as adjectives in a sentence.  We are focussing on prepositional phrases right now.  A prepositional phrases consists of the preposition plus its object.   Adverb phrases are prepositional phrases that modify the...