来自陈欣琦的问题
【he（play）soccerontheplaygroundnowhe（play）soccerontheplaygroundyesterdayhe（play）soccerontheplaygroundwhenIsawhimyesterdayhe（play）soccerontheplaygroundeverydayhe（play）soccerontheplaygroundtomorrow】
he（play）soccerontheplaygroundnow
he（play）soccerontheplaygroundyesterday
he（play）soccerontheplaygroundwhenIsawhimyesterday
he（play）soccerontheplaygroundeveryday
he（play）soccerontheplaygroundtomorrowafternoon
he（play）soccerontheplaygroundforalongtime
