含義不同，用法不同。go on to do的含義是做了一件事后，接著做另一件事；go on doing的含義是繼續(xù)做原來做的事。go on doing是分詞作賓語；go on to do是不定式作目的狀語。

go on to do的用法

go on to do sth的意思是：做完某事后接著做另一事。其中的不定式為目的狀語。如：

He went on to show us how to do it.他接著又教我們如何做。

The minister went on to talk about foreign policy.部長接著就談外交政策。

Go on to do the other exercises after you have finished this one.做完這個練習后，請接著做其它的練習。

After approving the agenda, we went on to discuss finance.通過了議事日程后，我們接著討論財政問題。

He began by showing us where the island was and went on to tell us about its climate.他先給我們指出那個島的位置，接著就講起島上的氣候來。

go on doing的用法

go ondoing sth的意思是：繼續(xù)(不停地)做正在做的事。如：

The minister went on talking for two hours.部長一連談了兩個小時。

You can’t go on working all night without a rest.你不能通宵工作而不休息。

We went on talking till after midnight.我們繼續(xù)談話直到午夜以后。

You can’t go on working without a break.人不能不停地工作而不休息。

You’ll crack up if you go on working so hard.你繼續(xù)這樣拼命干下去，身體會吃不消的。