第十八章 过去时态和完成时态175一般过去时形式A规则动词的过去式是在动词原形后加 ed构成的:动词原形:work过去式:worked以e结尾的动词只加d:动词原形:love过去式: loved对所有人称,均无词形变化:I worked ?you worked he worked等规则和不规则动词的否定式均由 did notdidn t动词原形构成:I did notdidnt work you did notdidnt work等疑问式则均由 did主语动词原形构成:did I work? did you work?等否定疑问式:did you notdidnt you work?等B拼写注意事项加ing时最后一个辅音字母双写的规则(参见第165节)也适用于加ed的场合:admit,admittedstop, stoppedtravel,travelled以y结尾的动词,y前为辅音字母时,在加ed之前要把y变为i:carry, carriedtry, tried但y前面