1. 形式上的区别：
– 现在分词：通常由动词的现在式加上-ing后缀构成。例如，stop的现在分词是stopping。
– 过去分词：通常由动词的过去式或过去分词形式构成。对于规则动词，过去分词通常与过去式相同，如stop的过去分词是stopped；对于不规则动词，过去分词形式可能会有所不同，如go的过去分词是gone。
2. 用法上的区别：
– 现在分词：
– 用作形容词：现在分词可以用来构成形容词，描述事物的性质或状态。例如，a sleeping cat（一只正在睡觉的猫）。
– 用作进行时态：现在分词与be动词连用，可以构成现在进行时态，表示正在进行的动作。例如，I am stopping by the store（我正在去商店的路上）。
– 用作非谓语动词：现在分词可以作为非谓语动词使用，如作定语、状语等。例如，The man running towards us is our friend（向我们跑来的那个男人是我们的朋友）。
– 过去分词：
– 用作形容词：过去分词可以用来构成形容词，表示被动或完成的动作。例如，a stopped car（一辆停着的车）。
– 用作完成时态：过去分词与have/has连用，可以构成现在完成时态，表示动作已经完成。例如，I have stopped smoking（我已经了）。
– 用作非谓语动词：过去分词也可以作为非谓语动词使用，如作定语、状语等。例如，The book that has been read by everyone is fascinating（那本每个人都读过的书很吸引人）。
+-++
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| stop (动词) | stopping (现在分词) |
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+–+-+–+–+
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