牛津实用英语语法 175形式
分类: 英语学习方法
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