在小学阶段，双写加ing的单词主要包括以下几类：

动词

begin ->

beginning

cut ->

cutting

put ->

putting

get ->

getting

swim ->

swimming

run ->

running

sit ->

sitting

stop ->

stopping

fit ->

fitting

hit ->

hitting

cut ->

cutting

drop ->

dropping

plan ->

planning

shop ->

shopping

trip ->

tripping

形容词

running ->

running

winning ->

winning

fitting ->

fitting

名词

-inning ->

inning

这些单词在小学阶段的语法学习中经常出现，掌握它们有助于学生更好地理解和运用英语时态和语态。建议学生在学习过程中多加练习，通过造句和写作来巩固这些词汇。