please（ don't） do sth 和would you please （not） do sth同样都是please,为什么一个是don't,一个是not呢?

please not do st.还是please don't do st. please not do 还是please don't do?为什么? Do you believe that January 1st of 2013 will come on time?Please answer this question.I don't want you to translate it. Do you believe that January 1st of 2013 will come on time?Please answer this question.I don't want you to translate it. please（ don't） do sth 和would you please （not） do sth同样都是please,为什么一个是don't,一个是not呢? could you please don't to do 还是could you please not to docould you please don't do 还是could you please not do please 否定加not还是don't如”Please do your homework“改否定 是”Please don't do your homework “还是”Please not do“ 祈使句中是Please don't do sth还是 Please not do sth? Shall I turn down the radio,Tom?It's a little loud.(选项如下）A、No,you won't B、Don't do that C、No,please don't D、Yes,please don't please don't park Please you don't please don't thouch Please Don't please don't go please don't flit Please don't please don't let please don't say