| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it have been [prep] [adj] | 116 |
|
| 2 | it may have been [adj] | 48 |
|
| 3 | may have been [prep] [adj] | 33 |
|
| 4 | it may have been [prep] | 26 |
|
