How long have you been like this?你这样多久了?II.语法全解延续性动词表示能够延续的动作,如:learn, work, stand, lie, know, walk, keep, have, wait, watch, sing, read, sleep, live, stay等。延续性动词可以与表示时间段的状语连用。 How long have you …? 你做某事多久了? I have …for two days / since two days ago.二、课堂活动Teaching Procedure:Step 1: lead in 呈现句型,询问别人的情况Step 2:review 复习重点短语Step 3:presentationsince 和 for 呈现,让学生理解这两个的用法,并对比二者的差异Step 4: role play 角色扮演,熟悉日常生活情景对话,把本单元所学知识用英语流利表达Step 5:总结本节课重难点Step 6 :通过做练习题巩固本单元语法Exerci