现在完成时的用法简单说是---完了,结果.肯定句1Shehaswrittentheletter.她刚写完信.2Ihaveeatenthecake.我刚刚吃完蛋糕.3Ihavefinishedmyhomework.我刚刚做完了我的家庭作业.4Theyhaveleftjustaminuteago.他们一分钟前刚离开.5Ihavegotacold.我感冒了.否定句1shehasn'tcomeyet.她还没来.2Theyhaven'tfinshedthejobyet.她们尚未完成该项工作.3Ihavenotseenthethemovieyet.我还没有去看那部电影.4Ihaven'teatenyet.我还没有吃.5Therainhasn'tstoppedyet.雨还没有停.疑问句1Haveyouhadlunchyet?你吃过午饭了吗?2Havetheygottherealready?他们到达那儿了吗?3Hasitstoppedrainingyet?雨停了没有?4Howlonghaveyoulivedhere你住在这里多久了?5Howlonghasshedied?她去世多久了?就是这些了,