No | Pattern | Freq | Relations |
---|---|---|---|
1 | must have been [verb] [prep] | 320 |
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2 | [modal v] have been [v-ing] [prep] | 288 |
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3 | must [verb] been [v-ing] [prep] | 81 |
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4 | must have been [v-ing] [prep] | 81 |
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5 | must have [be] [v-ing] [prep] | 81 |
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6 | must have [been] [v-ing] [prep] | 81 |
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7 | must have be [v-ing] [prep] | 81 |
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