keep on 是中間間斷後又繼續做
keep up 是壹直繼續做
我覺得學英語就是要多看，多讀壹點例句，自然就會水到渠成的，所以我幫妳找了這兩個詞組的壹些例句，希望能靜下心來都看壹遍，這樣壹定能對妳的理解有所幫助！^_^
keep up:
保持,繼續,維持
例句與用法:
1. The enemy kept up their bombardment day and night.
敵軍壹直日夜不停地狂轟濫炸。
2. The high cost of raw materials is keeping prices up.
原料費用昂貴使得產品價格居高不下。
3. The house is becoming too expensive for them to keep up.
他們的房子維修費用貴得越來越修不起了。
4. I can't keep up with all the changes in computer technology.
計算機技術的各種改進有些我已跟不上了.
5. Workers' incomes are not keeping up with inflation.
工人的收入趕不上通貨膨脹.
6. Let's hope the sunny weather keeps up for Saturday's tennis match.
但願星期六網球比賽時還是這樣的好天氣.
7. Slow down I can't keep up (with you)!
慢點, 我跟不上（妳）了!
8. You're all doing a splendid job; keep up the good work!
妳們幹得都很出色, 要堅持下去!
keep on:
vt. 繼續進行(接連,反復,繼續)
例句與用法:
1. Keep on past the church; the stadium is about half a mile further on.
壹直向前走過了教堂，約莫半英裏就是體育場。
2. I will mend the lamp just don't keep on at me about it!
我壹定修這個燈－－別再跟我嘮叨這件事了！
3. She kept on working although she was tired.
她雖疲勞但仍繼續工作。
4. The rain kept on all night.
雨徹夜不停.
5. We're planning to keep the cottage on over the summer.
我們打算夏天繼續租那座別墅.
6. He does keep on so!
他就是這樣愛嘮叨!
7. You don't need to keep your hat on indoors.
在室內不必戴 帽子了.
8. He's incompetent and not worth keeping on.
他庸碌無能, 不值得留用.