What differences are there between HAVE DONE and HAD DONE? What differences are there between HAVE DONE and HAD DONE?When should use them and which should I use?

kevin's notebook entry: Jan 19, 2011 I think my English is poor.But I can make my self understood in some foreign countries like America ,Australia,Canada,Britain and so on as long as the people can speak English well and pronaunce well.I can speak Mandarin and Contonese,the second one is my mother tongue!I love basketball and NBA.