get -- getting 得到，获得
forget -- forgetting 忘记
hit -- hitting 打，击，撞
spit -- spitting 吐痰
hiccup -- hiccupping 打嗝
run -- running 跑
sit -- sitting 坐
babysit -- babysitting 临时照看婴儿
split -- splitting
shut -- shutting 关闭
win --winning 赢
shop --shopping 购物
stop -- stopping 停止
drop -- dropping 落下
dig -- digging 挖
plan -- planning 计划
prefer -- preferring 更喜欢
refer -- referring 查阅，参考
let -- letting 让
step -- stepping 踩，踏
trip -- tripping 绊倒
rob -- robbing 抢劫
set -- setting 设置
dip-- dipping 浸
mop -- mopping 用拖把拖洗, 擦, 抹
nod -- nodding 点头
fit -- fitting 合适
fret -- fretting 使烦恼
kidnap -- kidnapping 绑架
nap -- napping 小睡，打盹
regret -- regretting 后悔
pop-- popping 爆开
prop -- propping 支撑
rot--rotting 腐烂
spot--spotting 玷污
slip--slipping 滑倒
wrap--wrapping包装
