| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it have [been] [prep] [det] | 46 |
|
| 2 | it may have [been] [prep] | 26 |
|
| 3 | may have [been] [prep] [det] | 13 |
|
| 4 | it may have [been] [det] | 13 |
|
