| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] have been put | 70 |
|
| 2 | [vb mod] have been put | 60 |
|
| 3 | could have been put | 22 |
|
| 4 | should have been put | 17 |
|
| 5 | would have been put | 13 |
|
| 6 | may have been put | 8 |
|
| 7 | [vb mod] have been putting | 8 |
|
| 8 | must have been put | 5 |
|
