you are stepping on my foot?

you are stepping on my foot? 请问,You are stepping on my foot.我看不懂, You are stepping on my foot 别人在称赞我之后回答这句, you are stepping on my foot(语境：别人夸奖了我,我说了这句话,别人说 sorry) No Stepping on the grass 还有个 ：Straight on. What are you on? you are on my are you on line Are you on Are you on crack You are on a Are you picking on you are on to I'm sorry for stepping on your foot.-----_____A.That's all rightB.Never you mind意思各是什么?为什么B不对? Stepping on cat vomit in your bare feet. Tim appologized to her for stepping on her foot. stepping forward going on backing away coming out That sort of defeats are only stepping-stones是什么意思