來(lái)源:網(wǎng)絡(luò)資源 2022-10-18 08:52:49
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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