No | Pattern | Freq | Relations |
---|---|---|---|
1 | it must [vb infin] been one [prep] | 8 | |
2 | it must have been one [prep] | 8 | |
3 | it must [verb] been one [prep] | 8 | |
4 | it must [verb] been one [prep] | 8 | |
5 | it must have been one [prep] | 8 | |
6 | it must [verb] been one of | 8 |