现在完成时之瞬间动词转变为持续性动词

现在完成时之瞬间动词转变为持续性动词 一、兴趣导入:Teacher: Tom, why are you late for school every day? Tom: Every time I com

现在完成时之瞬间动词转变为持续性动词 一、兴趣导入:Teacher: Tom, why are you late for school every day? Tom: Every time Icome to the corner, asign says, "School-Go Slow". 二、知识点回顾:现在完成时基本用法 三、(1)专题讲解: 在完成时中,一个瞬间性动词(一次性动作)不能与表示一段时间的状语(for, since, how long等)连用,此时须将该瞬间动词改为延续性动词或状态动词. Eg: buy (bought )--- have /has had 买 borrow (borrowed) --- have /has kept 借 die (died )--- have /has been dead 死 leave (left )--- have /has been away (from )离开 begin (began )--- have /has been on 开始 join (joined) --- have /has been in 参加 --- have /has been a( party) member go (went) --- have /has been there /in 去 come/arrive/reach/get to --- have /has been here /in 来/到达