No | Pattern | Freq | Relations |
---|---|---|---|
1 | must have been [prep] | 289 |
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2 | [modal v] have been for | 62 |
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3 | must [verb] been for | 14 |
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4 | must have been for | 14 |
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5 | must have [been] for | 14 |
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6 | must [vb infin] been for | 14 |
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7 | must have be for | 14 |
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8 | must have [be] for | 14 |
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