| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may have been [adj] [prep] | 178 |
|
| 2 | they have been [adj] [prep] | 160 |
|
| 3 | they may have been [adj] | 18 |
|
| 4 | they may have been [prep] | 8 |
|
