初中英语牛津上海版九年级八大时态专题讲解学案（含答案）.docx

PAGE PAGE 3 八大时态的用法 一般现在时基本用法介绍 一．构成：使用动词原形，第三人称单数须有变化。 （1）直接加“s”，work →works，take →takes （2）以辅音加“y”结尾，变“y”为“i”，再加“es” carry → carries （3）以“o, s, x, ch, sh”结尾的动词加“es” go→ goes watch→watches 二．功能： （1）表现在的事实、状态或动作： eg: ?. Birds fly. ?. She loves music. ?. Marys parents get up very early. （2）表习惯性动作或职业，常与often，sometimes，usually，always，every week，seldom，occasionally，frequently等时间副词连用。 eg: ?. I always take a walk after supper. ?. She writes to me very often. ?. Tom and his girlfriend go out to take a picnic occasionally. （3）表客观真理，格言警句或事实： ?. The earth moves round the sun. ?. The sun rises in the east and sets in the west. ?. Two and two makes four. ?. No man but errs. 人非圣贤，熟能无过。 （4）表将来： A．在由when，after, before，as，as soon as，although，because，if，even if，in case， till，until，unless，so long as，where，whatever，wherever 等引导的状语从句中用一般 现在时表将来发生的动作。 （黄金重点，所有考试都不放过它！） eg: ?. Ill tell her when shecomes tomorrow. ?. Even ifit rains this afternoon, Ill meet you. ?. Whatever happens, you should keep cool-headed. （不错的句型，背下！！） ?. Ill be right here waiting for you wherever you go.（很感人的句型！） B．按时间表示将要发生的动作或事件，用一般现在时表达将来时概念。 ?. The play begins at 6:30 this evening. ?. When does the plane take off? ?. He leaves for that city next week. ?. According to the timetable,the express train to Shanghai starts at nine in the morning. 三．时间状语：?always，often，?usually，sometimes，never，rarely, seldom，hardly，every， once a week，on Sundays，in the morning… 一般过去时基本用法介绍 一．构成：过去式 1．一般在动词末尾加-ed，如：pull-pulled, cook-cooked 2．结尾是e加d，如：taste-tasted 3．末尾是辅元辅结尾的重读闭音节，应双写末尾的辅音字母，再加-ed，如： stop-stopped shop-shoppped drop-dropped 4．以“辅音字母+y”结尾的，变y为i， 再加-ed，如：study-studied 5．不规则动词过去式：需要特殊记忆。 iswas are--were havehad do--did go--went 二．功能： （1）表示过去某个特定时间或某一段时间发生的动作或情况。 ?. We visited the school last spring. ?. I went to school by bike when I was in middle school. ?. China was founded in 1949. （2）在表示时间或条件等的状语从句中代替过去将来时。 ?. She told me that she would not go with us if it rai