人教八下Unit5-when和while的用法和区别(共16张PPT)

控制测量实习报告心得范文第一部分序言一实习目的本次控制测量实习的目的是培养学生综合应用控制测量理论知识进行控制网的布设、精密角度测量、精密水准测量的观测与计算的能力。二实习任务与内容1、一级导线测量每组完成一条一级导线的测量工作。2、二等水准测量三实习地点与时间1、本次实习地点选在沧州市南起新华西路,北至北环路,东起永安大道,西至开元大道。控制内面积约3平方公里。2、时间分配:动员、借领仪器半天踏勘选点1天仪器检验校正2天距离测量、角度测量、水准测量18天内业计算2天整理材料、交还仪器2天机动2天四实习用仪器工具DJ2经纬仪一套DS1水准仪一套全站仪一套双面尺一付尺垫2个花杆2根测旗2面望远镜1个对讲机3个背包1个记录夹1个铅笔盒1个测伞1把测绳(100米)1根五实习队组织领导实习队长1人,负责测量队全面工作;指时间状语从句中when和while的用法及区别课程内容：课程目标1.时间状语从句中when的含义及用法2.时间状语从句中while的含义及用法3.when和while的用法区分（重点）导入你能找出句子中的状语么？Shestudieshardintheuniversityeveryday.Shestudieshardintheuniversityeveryday.导入状语——谓语动词的状态，包括时间、地点、原因、状态、目的、结果、方式、程度等。导入Shestudieshardintheuniversityeveryday.时间状语时间状语从句Shestudieshardwhenshewasintheuniversity.主句从句When表示”当…时候”。主句用过去进行时。从句中既可以用延续性动词,又可以用非延续性动词,这些动词既可以表示动作,又可以表示状态。从句中的动作既可和主句动作同时发生,又可在主句动作之前或之后发生。tH:MarywashavingdinnerwhenIsawherTheboywasstillsleepingwhenhismothergothomeyesterdayevening知识卡片一：whenMarywasstudyingwhenIsawher.Johnwassleepingwhenhismothergothomeyesterdayevening.MaryboughtagiftWhenJohnwastakingphotos.含义when为“当...的时候”多用一般过去时也可用过去进行时when引导时间状语从句用法-Mom，I'mhungryI'dlikesomethingtoeat．-Oh，dear．Here'ssomebread.A.such；thatB.so；that例题讲解1.Mr.Greenwastalkingonthephone___Iarrivedathisoffice.A.whenB.afterC.whereA-Mom，I'mhungryI'dlikesomethingtoeat．-Oh，dear．Here'ssomebread.A.such；thatB.so；that知识卡片二:whileMr.JohnsoncalledmewhileIwasdoingmyhomework.TheweatherwasfinewhileweweretravellinginBeijing.含义While表示“在....时候”、“在…期间”。TheweatherwasfinewhilewetravelledinBeijing.While引导的时间状语从句用法从句多用进行时不可用一般过去时-Mom，I'mhungryI'dlikesomethingtoeat．-Oh，dear．Here'ssomebread.A.such；thatB.so；that例题讲解1.Tedfelloffhisbicyclewhilehe______itandhurthimself.A.wasridingB.rodeC.wereridingD.rideA综合练习1.Hewasabouttogotobed________thedoorbellrang.A.whileB.beforeC.when2._______JohnwaswatchingTV,hiswifewascooking.A.AfterC.WhileC.Until3.Hereachedtheschoolgate________thebellrang.A.whileB.whenC.since-Mom，I'mhungryI'dlikesomethingtoeat．-Oh，dear．Here'ssomebread.A.such；thatB.so；that知识卡片三：区别主从句时态角度观察下列句子并总结whenwhile用法：1.Itwasrainingheavilywhenwearrived.2.Theboyfellasleepwhen/whileIwasreading.3.Iwasdoinghomeworkwhilemymotherwascooking.时态区分应用练习whenVSwhile1._________Iarrivedhome,motherwascooking.2._________shewastalking,hersisterwalkedin.2._________Ifoundmydog,itwasplayingwithanotherdog.4._________Iwasdancing,hewassingingloudly.Summary1When可指时间点,又可指时间段,从句中可用延续性动词,也可用非延续性动词。2While总是指一个时间段,从句中必须用延续性动词。3统一时态:主句过去式,从句也是过去式一、动词角度1.When=duringthetimeoratthetime从句中可用延续性动词,也可用非延续性动词；2.While=duringthetime，从句中必须用延续性动词。when和while拓展区分注：能够区分延续性和非延续性动词的学生补充Summary1When可指时间点,又可指时间段,从句中可用延续性动词,也可用非延续性动词。2While总是指一个时间段,从句中必须用延续性动词。3统一时态:主句过去式,从句也是过去式二、主从句动作关系角度when和while拓展区分1.Itwasrainingheavilywhenwearrived.2.Theboyfellasleepwhen/whileIwasreading.3.Iwasdoinghomeworkwhilemymotherwascooking.Summary1When可指时间点,又可指时间段,从句中可用延续性动词,也可用非延续性动词。2While总是指一个时间段,从句中必须用延续性动词。3统一时态:主句过去式,从句也是过去式总结seeyounexttime!