谁能告诉我 my pleasure 、 it is my pleasure 和mypleasure 的区别和用的场合?

谁能告诉我 my pleasure 、 it is my pleasure 和mypleasure 的区别和用的场合? it's a pleasure和it's my pleasure等区别百度后看到了无数种解释...谁能准确地告诉我为了应付高考,那么it'a pleasureit' my pleasurea pleasuremy pleasurewith pleasurewith my pleasure这六个短语之间的区别 My pleasure, my pleasure that is my pleasure my pleasure是什么意思 my pleasure汉语意思 it is my pleasure. with pleasure 和my pleasure 区别 my pleasure和with pleasure的区别 with pleasure /my pleasure的区别 witn pleasure 和my pleasure 的区别, witn pleasure 和my pleasure 的区别, with pleasure,with my pleasure 和it's a pleasure It's a pleasure My pleasure with pleasure的区别 【It's a pleasure、It's my pleasure、With pleasure、My pleasure】区别 It's a pleasure.it's my pleasure.with pleasure.My pleasure.的区别 pleasure的短语It's my pleasure.With pleasure.My pleasure.区别在哪?