when后面动词可以加ing吗

Question

简单说明

Answer 1

可以,在省略主语的时候

Answer 2

可以，look out when walking across the street= look out when u walk across a street

Answer 3

Be careful when making love.
ing前面省略了you are
可以加 在省略主语的时候
比如look out when walking across the street= look out when u walk across a street本回答被提问者采纳

Answer 4

Be careful when making love.
ing前面省略了you are