Unit1 知识点总结1. 主语+have/has been to + 地点 “去过某地” （已返回）主语+have/has gone to +地点 “去了某地” （未回来）主语+have/has been in +地点+for +段时间 （待在某地，动作可以延长一定时间，后面常接段的时间）She has been in Japan for 2 year.She has been to Japan. She has gone to Japan. 地点是名词须接to ，如果地点是副词则不接to。 Tom has been there. 对地点提问用：where 2.频度副词already,yet ,just,ever,never,在现在完成时中的作用（1）already 用在肯定句，用与句中，句尾均可，“已经” Ive finished my homework already. Ive already finished my homework .
