No | Pattern | Freq | Relations |
---|---|---|---|
1 | [noun] must have been [v-ing] [prep] | 19 |
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2 | [noun sg] must have been [v-ing] [prep] | 8 |
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3 | [noun prp] must have been [v-ing] [prep] | 7 |
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4 | [noun] must have been [v-ing] in | 6 |
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