题目内容：

20个英语单词的ing形式
要写出单词的原来样子,
和三单形式 ,是实义动词

优质解答

do doing
make making
wait waiting
go going
come coming
say saying
speak speaking
think thinking
listen listening
sit sitting
stand standing
understand understanding
sing singing
work working
draw drawing
write writing
read reading
watch watching
take taking
walk walking
run running