keep in  隐瞒，隐藏抑制继续燃烧。动词词组。其用法如下：
1、keep in with sb（为得到好处而）与某人友好相处、不得罪某人
2、keep sth in 控制（或抑制）感情
比如：keep sth in mind 记住  记着  想着  记住某事
3、keep sb in 留下  
而keeping是keep的现在分词，表示：
作为动词：(使)保持，处于继续，重复(做某事)使耽搁使延误
作为名词：保持保管饲养协调
keep in和keeping的区别

一，keep in
1、keep in with sb（为得到好处而）与某人友好相处、不得罪某人
I had to keep in with the people who mattered.我得和管事儿的人保持良好关系。
2、keep sth in 控制（或抑制）感情
He could scarcely keep in his indignation.他几乎控制不住自己的愤怒。
二，keeping
n. 保管一致协调遵守
v. 保持遵守（keep的ing形式）
例句
His office was in keeping with his station and experience.他的办公室与其身份和阅历相称
Bankers are keeping a wary eye on the outcome.银行家们对结果保持高度警惕。
Keeping inflation low is the keystone of their economic policy.将通货膨胀率保持在较低水平是他们经济政策的主旨
I think he enjoyed keeping our love a secret.我觉得他喜欢和我偷偷摸摸地谈恋爱。
keep in和keeping的区别

keep in是个词组，意为"隐瞒，抑制"，keeping是个单词，作动词为"保持，占有，遵守"，作名词意为"拥有，保护，一致"