2023年初中數(shù)學(xué)一般過(guò)去時(shí)定義用法

一般過(guò)去時(shí)

一、定義

一般過(guò)去時(shí)是表示過(guò)去經(jīng)�；蚺既话l(fā)生的動(dòng)作或存在的狀態(tài)。

二、用法

① 在確定的過(guò)去時(shí)間里所發(fā)生的動(dòng)作或存在的狀態(tài)。

時(shí)間狀語(yǔ)有∶just now;yesterday; last week; an hour ago; the other day; in 1982 等。Where did you go just now?She wasn't at home last night.

② 表示在過(guò)去一段時(shí)間內(nèi)，經(jīng)常性或習(xí)慣性的動(dòng)作。

When I was a child, I often played football in the street.

Whenever the Browns went during their visit, they were given a warm welcome.

三、結(jié)構(gòu)1.肯定形式① be動(dòng)詞was / were …

② 行為動(dòng)詞動(dòng)詞的過(guò)去式(動(dòng)詞過(guò)去式分規(guī)則變化與不規(guī)則變化)如 He was a teacher 3 years ago.

Jenny visited Shanghai last month. I went to school at 6:30 yesterday.

規(guī)則動(dòng)詞的過(guò)去式的構(gòu)成遵循以下四個(gè)規(guī)則∶

a.直接在動(dòng)詞后加ed，例如help-helpedwant-wanted等

b.以不發(fā)音的字母e結(jié)尾時(shí)，去掉e加ed(即直接加d)，例如like-liked;use-used等

c. 以輔音字母y結(jié)尾時(shí)，把y變成i再加ed，例如carry-carried; study-studied等;

d.以重讀閉音節(jié)結(jié)尾，雙寫(xiě)最后一個(gè)輔音字母再加ed，例如∶stop-stopped;shop-shopped等。不規(guī)則動(dòng)詞的過(guò)去式則需要特殊記，例如go-wentcome-came;buy-bought等。

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