1、意思上的区别
keep doing sth：继续做某事；不停地做；反复做某事。
keep sb doing sth：使某人一直做某事，让某人保持做某事。
keep sb from doing sth：妨碍、防止某人做某事。
2、用法上的区别
keep doing sth：是说话的人自己要保持做什么事。
keep sb doing sth：是动词+动词ing，表示正在进行或持续进行的状态。
keep sb from doing sth：表示保护某人免受什么事。
3、例句：
①、keep doing sth
I keep doing sign language, so I forget how to speak.
我一直做手语，我都不知道怎么说了。
I want to keep doing this while I am not thankful for the user's number.
我想要一直这样做，当我对用户的，数字不满意。
②、keep sb doing sth
I don't want to keep you waiting for us too long.
我不想让你等我们太长时间。
The boss kept them working twelve hours a day
老板让他们一天不停地干十二小时的工作。
③、keep sb from doing sth.
The wind can usually keep us from walking to school
风通常能阻止我们走着去上学。
扩展资料
同义句型解析：
①、get on with
意思：继续（干某事）；和…友好相处。
Let him say what he likes; I'll just get on with my work.
他说他的，我干我的。
People will talk, but you have to get on with your life.
人们会有议论，但日子还得过下去。
②、got on with
意思：继续做
I wonder how Sam got on with him.
我不知道萨姆和他相处得怎么样。
I just buckled down and got on with playing.
我干脆静下心来继续玩。
To keep doing sth until you have been successful.也就是很多人都没有成功的根本原因吧。
keep sb.doing sth.使某人一直做某事.,让某人保持做某事
I keep my son doing homework every evening.
keep sb from doing 妨碍、防止某人做某事
We should keep children from playing games too much.我们应防止孩子们过份玩游戏。
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例子；I keep doing homework ,. 我一直坚持做作业
2,keep sb doing sth 让某人一直干某事
例子；His mother keeps him doing homework. 他妈妈让他一直做作业
3.keep sb from doing sth 阻止某人干某事
例子；She keeps him from talking .她不让他说话
希望得到采纳
eg：You must keep doing homework.
2.keep sb doing sth：表示使某人持续做某事
eg：My father keep me washing cars with him.
3.keep sb from doing sth：表示保护某人免受……
eg：We must keep rivers from pouring the sewage into it.
keep sb doing 是指保持另外的人做什么事
keep sb from doing sth是保护、阻止某人做某事，相当于prevent/stop sb from doing sth