In class activities

Study these tables, pay attention to the list of Verbs Followed by an Object and an Infinitive: http://grammar.ccc.commnet.edu/grammar/verblist.htm

Do the following exercises:

http://speakspeak.com/english-grammar-exercises/intermediate/verb-object-to-infinitive

http://www.perfect-english-grammar.com/gerunds-and-infinitives-exercise-1.html

http://www.englishgrammarsecrets.com/ingform/exercise4.swf

http://www.englisch-hilfen.de/en/exercises/structures/gerund_prepositions2.htm

Practice verb/adjective + preposition+ gerund

http://www.englishgrammarsecrets.com/ingform/exercise3.swf

Read this and practice passive voice

http://www.perfect-english-grammar.com/passive.html

http://www.esl-lounge.com/student/grammar/3g20-passive-active-exercise.php

http://www.english-grammar-lessons.com/passive/exercise2.swf