外研版八年级下册Module 4 语法知识点总结及练习（无答案）

Module 4 Seeing the doctor 一、Key Grammar 现在完成时（三） 1. for 和 since 引导的状语（从句）与现在完成时连用 (1) for 是介词，其后接一段时间； Eg. I have taught here for ten years. (2) since 可作介词，也可作连词，其后接时间点或从句。 Eg. I have been here since 2010. Eg. We have been friends since we were young. Eg. I have lived here since three years ago. 2. 非延续性动词在现在完成时中的用法 (1)非延续性动词也称终止性动词、瞬间动词,表示不能延续的动作,这种动作发生后立即结束。如：come, go, join, leave, buy, die, borrow, begin 等。 (2)非延续性动词虽然可用于完成时，但是不能与表示一段时间的状语连用。若句中有表示一段时间的状语，要将非延续性动词转化为延续性动词。 (3)延续性动词与非延续性动词之间的转换： leave --- be away(from) borrow --- keep buy --- have begin/start --- be on die --- be dead finish --- be over join --- be in+组织机构 be a member of+组织机构 open sth --- keep sth open fall ill --- be ill get up---be up catch a cold --- have a cold come here --- be here go there --- be there become --- be come back --- be back fall asleep --- be asleep get to/ arrive/reach --- be (in) get to know --- know go (get) out ---be out put on---wear Eg. The old man died 4 years ago. =