1、意思不同
keep away意為“不接近；離開；避開等”。
keep off意為“不接近；使離開”。
2、用法不同
keep away：away是副詞，其後通常與from搭配使用。
例如：Keep away from the fire! 勿靠近火爐！
keep off：off既可用作介詞，也可用作副詞。
例如：Animals were afraid of fire, so they made a big fire to keep wild animals off (= keep off wild animals). 動物怕火， 因此他們生起了一堆大火以防野獸接近。
擴充套件資料
keep與介詞或副詞搭配，構成動詞短語。
1、keep back意為“阻止；留在後面”。如：
She sat down quietly, but she couldn't keep back her tears.
她靜靜地坐下來，卻忍不住流下了眼淚。
2、keep together意為“在一起；動作協調”。如：
The eight men kept together during the boat race as though they were one.
賽船時，這8個人動作協調，好像一個人似的。
3、keep up意為“持續；使不低落”。如：
The noise kept up all night.
噪音整夜持續著。
4、keep up with意為“跟上；和……來往”。如：
I'm trying my best to keep up with the others in class.
我正在設法趕上班裡的其他人。
5、keep...in mind意為“把……記在心裡”。如：
The teacher asked us to keep these sentences in mind.
老師要我們把這些句子記在心裡。
1、意思不同
keep away意為“不接近；離開；避開等”。
keep off意為“不接近；使離開”。
2、用法不同
keep away：away是副詞，其後通常與from搭配使用。
例如：Keep away from the fire! 勿靠近火爐！
keep off：off既可用作介詞，也可用作副詞。
例如：Animals were afraid of fire, so they made a big fire to keep wild animals off (= keep off wild animals). 動物怕火， 因此他們生起了一堆大火以防野獸接近。
擴充套件資料
keep與介詞或副詞搭配，構成動詞短語。
1、keep back意為“阻止；留在後面”。如：
She sat down quietly, but she couldn't keep back her tears.
她靜靜地坐下來，卻忍不住流下了眼淚。
2、keep together意為“在一起；動作協調”。如：
The eight men kept together during the boat race as though they were one.
賽船時，這8個人動作協調，好像一個人似的。
3、keep up意為“持續；使不低落”。如：
The noise kept up all night.
噪音整夜持續著。
4、keep up with意為“跟上；和……來往”。如：
I'm trying my best to keep up with the others in class.
我正在設法趕上班裡的其他人。
5、keep...in mind意為“把……記在心裡”。如：
The teacher asked us to keep these sentences in mind.
老師要我們把這些句子記在心裡。