In the afternoon I did some baby-sitting,for it is a fun to look after children改错
问题描述：
In the afternoon I did some baby-sitting,for it is a fun to look after children改错
答
去掉 a ，fun是不可数的
答
did 改为 do
答
去掉a
"fan"是不可数名词
所以没有a fun之说
答
some去掉 for去掉 children前加some