The past tense of "slip" is "slipped" and the past participle is also "slipped."
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The past tense of the verb "slip" is "slipped."
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Yes, "slipped" is a transitive verb when it is followed by a direct object. For example, "She slipped on the ice." In this sentence, "ice" is the direct object of the verb "slipped."
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I believe there are 2 syllables in the word, slipped!