Try to do sth.表示尽自己最大能力做某事,等同于try one's best to do sth.
Try doing sth.表示尝试着做某事
try to do sth.
表示对于某一件事情尽力想办法去解决,去做,这里强调的是要设法、想法的意思
try doing
就是尽力去做,尝试去做,比如别人教你怎么打排球,然后你就自己学着去不断的联系,努力模仿,重复动作等.
比较：
He tries to get the apple above the shelf.But fails to reach it.After a while ,Brown comes in and try showing his ability.