一般过去式的变化规则
1、一般在动词末尾加-ed;
work—workedplay—playedwant—wanted ask—aske d
2、结尾是e加d;
作精是什么意思
live—lived move—moved taste—tasted 
古代数学
3、以重读闭音节结尾,末尾只有一个辅音字母,双写这个辅音字母,再加-ed,
stop—stopped;stop-stoppedship- shipped;occur-occurred
4、以“辅音字母+y”结尾的,变y为i, 再加-ed;
study—studiestry—triedcopy—copied carry—carried
5、以“元音字母+y”结尾的,加-ed;
destroy- destroyed
6、以“ic”结尾的,加k, 再加-ed;
picnic-picnicked;panic-panicked
7、不规则动词过去式
teach-taught; bring-brought; think-thought;
fall-fell; hurt-hurt; break-broke; win-won;
lose-lost; swim-swam
假处女
动词现在分词的变化规则
1、在动词后直接加-ing
study---studying
2、以-e结尾的动词去e再加-ing
live---living;write---writing
3、以重读闭音节结尾,末尾只有一个辅音字母,双写这个辅音字母再加-ing
begin---beginning
1、以-ee、-oe结尾的动词直接加-ing
see—seeing;agree—agreeing; free—freeing;flee—fleeing;二年级数学除法 tiptoe—tiptoeing(踮起脚)
2、以-ie结尾的动词,变-ie为-y再加-ing
卧薪尝胆的意思lie— lying,tie—tying,die—dying,
3、以-ic结尾的动词先加-k再加-ing
珠港澳大桥多长
picnic—picnicking(去野餐);
panic—panicking(使恐慌)