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牛津实用英语语法 175形式

18

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 not/didn’ t+动词原形构成:

I did not/didn’t work                   you did not/didn’t 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 not/didn’t 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,admitted

stop, stopped

travel,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, carried

try, tried

但y前面是元音字母时则不变:

obey, obeyed

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