keep的过去式和过去分词是什么？
keep的过去式：kept
keep的过去分词：kept
kept作为过去式时：表⽰过去发⽣的事，有保持的意思
1、The police dog has been kept in service far longer .
这只警⽝已经服役很久了。
2、 He kept his eyes on the wall.
他的眼睛⼀直盯着墙。
3、Apples can be kept for a long time without going mouldy.
苹果可以存放很长⼀段时间并不会腐烂。
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4、if you kept your nose clean, you had a job for life.
如果你规规矩矩，就可以⼀辈⼦都有这份⼯作。
kept作为过去分词时，被保留，必须与助动词⼀起使⽤
1、A meticulous attitude should be kept in her class.
在她上课的时候要保持⼀个认真细致的态度。
2、We have kept in contact with each other.
我们彼此相互联系已经有⼀段时间了。
3、They started years and years ago and they have kept it up.
stop的过去式是什么多年前他们就⼀直这样⽽且继续保持这项传统。
拓展：
keep 的现在分词是keeping ，⼀直做某事，重复做某事
1、His behavior was not in keeping with the solemn occasion.
他的举⽌与这庄严的场合不协调。
2、This will wick the sweat away from your body, keeping you dry.这将会让你⾝上的汗⽔吹⼲，使你的⾝体保持⼲燥。
3、Keeping your eye on the ball remains the best advice.
你的眼睛⼀直保持着球，这是⼀个⾮常好的建议。