1.let→letting 让
hit→hitting 打、撞
cut→cutting 切、割
get→getting 取、得到
sit→sitting 坐
forget→forgetting 忘记
put→putting 放
set→setting 设置
babysit→babysitting 临时受雇照顾婴儿
2.shop→shopping 购物
trip→tripping 绊
stop→stopping 停止
drop→dropping 放弃
3.travel→travel(l)ing 旅游
swim→swimming 游泳
run→running 跑步
dig→digging 挖、掘
begin→beginning 开始
prefer→preferring 宁愿
plan→planning 计划
技巧：从末尾数,凡是辅元辅的,通常是