最新初中数学思维导图树形图1初中数学知识树 fight 作战 fought fought spell 拼写 spelt / spelled spelt / spelled6. 含有元音字母o / i的词,将o / i变成a。如:singsang, givegave, sitsat, drinkdrank forgive 原谅 forgave forgiven smell 发出气味 smelt smeltbear 忍受 bore born meet 遇到 met met ride 骑 rode ridden sing 唱歌 sang sung不规则动词表