One of your main problems when doing speaking activities is pronunciation. The following are some links that may help you to improve it.
IRREGULAR VERBS
http://www.manythings.org/repeat/
REGULAR PAST
http://www.eflnet.com/tutorials/finaled.php
PRONUNCIATION DICTIONARY
http://www.eflnet.com/tutorials/finaled.php
CONNECTED SPEECH
http://www.bbc.co.uk/worldservice/learningenglish/grammar/pron/features/connected.shtml
BE CAREFUL WITH THE PRONUNCIATION OF BUSY!!
