| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | that [vb mod] have been | 423 |
|
| 2 | that would have been | 121 |
|
| 3 | that might have been | 94 |
|
| 4 | that could have been | 75 |
|
| 5 | that should have been | 61 |
|
| 6 | that may have been | 44 |
|
| 7 | that must have been | 30 |
|
