He can't help crying upon hearing of this sad news, but crying can't solve the problem.
He couldn't help crying when he heard the sad news.But there is no use in doing that.
On hearing the news,he couldn't help crying,which made no contribution to solving the problem,though.
Heard the sad news he could not help crying, but crying will not solve the problem.
he can not bear to cry when he heared the sad news but crying can hardly solve any problem