sit in on
verb
Infinitive
sit in on
Present tense 3rd person singular
sits in on
Preterite
sat in on
Present participle
sitting in on
Past participle
sat in on
verb
sit in on
sits in on
sat in on
sitting in on
sat in on
verb
verb
verb
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verb
verb irregular vt vi
verb
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verb
verb
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verb
verb
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verb
verb
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verb
verb