1.一般过去时的构成
一般过去时由动词的过去式构成。动词过去式的变化规则有:
规则动词的变化:
①一般情况下在动词后直接加ed。
look—looked clean—cleaned
②以e结尾的动词后直接加d。
like—liked dance—danced
③以辅音字母 y结尾的动词,变y 为i,再加ed。
study—studied worry—worried
特别提示:以元音字母 y结尾的动词,不需要变化,直接加ed。
destroy—destroyed play—played stay--stayed
④以重读闭音节或/r/音节结尾,并且以一个辅音字母结尾,双写最后一个字母,再加ed。
stop—stopped permit—permitted admit—admitted prefer—preferred refer—referred occur—occurred
不规则动词的变化:
be动词的变化:
is/am—was;are—were
do/does—did;has/have—had ;see—saw;break—broke等等。
不规则动词的变化形式需根据不规则动词表进行记忆。
2.一般过去时的用法
①表示在过去某一时间段内习惯性的或经常性的动作。常用的时间状语有:often,seldom,usually等。
He often played by the riverside when he was young.
他小的时常在河边玩耍。
②表示在过去某个时间所发生的动作或状态,在过去已经结束,与现在没有关系。常用的时间状语有:last week,in 1981,yesterday,ten years ago等。
He took a day off last week.
他上周请了一天假。
He was elected president in 1980.
他于1980年当选总统。
③在时间状语从句,条件状语从句中用过去式表示过去将来。
He said he would tell me about it if he heard any news.
他说如果他听到任何消息就会告诉我。
We wouldn't be allowed to leave until the exam was over.
直到考试结束,我们才被允许离开。
④一般过去时用于虚拟语气中,表示与现在或将来事实相反。
If I were you, I would go camping with him.
如果我是你,我就和他一起去野营。
If it rained tomorrow, the sports meeting would be cancelled.
如果明天下雨,运动会就会取消。
I wish I were 10 years younger.
我希望我能年轻十岁。
It's time that we went to school.
我们该去上学了。
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