become—became, come—came
2．把動詞原形中的i改
drive—drove，ride—rode，shine—shone，win—won，write—wrote
4．動詞原形中的e改為o，變成過去式。如：
get—got，forget—forgot
keep—kept，sleep—slept，sweep—swept
stand—stood，understand—understood
draw—drew，grow—grew，know—knew， dream—dreamt