| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it must [vb infin] been [prep] [prep] | 7 |
|
| 2 | it must have been [prep] [prep] | 7 |
|
| 3 | it must have been [prep] [prep] | 7 |
|
| 4 | it must [verb] been like [prep] | 7 |
|
| 5 | it must [verb] been like [prep] | 7 |
|
| 6 | it must [verb] been [prep] [prep] | 7 |
|
| 7 | it must [verb] been [prep] [prep] | 7 |
|
| 8 | it must [verb] been [prep] for | 5 |
|
