can could 能
may might 可能
shall should 应该
will would 将
bring brought brought 带来
buy bought bought 买
fight fought fought 打、击
think thought thought 想 认为
teach taught taught 教
catch caught caught 抓
feel felt felt 感觉
keep kept kept 保持
sleep slept slept 睡觉
sweep swept swept 打扫
give gave given 给
ride rode ridden 骑
speak spoke spoken 说 讲
take took taken 带
write wrote written 写