| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | and have been [vb pp] [prep] | 640 |
|
| 2 | may have been [vb pp] [prep] | 550 |
|
| 3 | and may have [vb pp] [prep] | 21 |
|
| 4 | and may have been [vb pp] | 18 |
|
