| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] have been the first | 41 |
|
| 2 | [vb mod] have [been] the first | 41 |
|
| 3 | [vb mod] have [been] the first | 40 |
|
| 4 | would have [been] the first | 21 |
|
| 5 | may have [been] the first | 10 |
|
