| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] well have been a | 30 |
|
| 2 | [vb mod] well have [been] a | 30 |
|
| 3 | [vb mod] well have be a | 30 |
|
| 4 | may well have [be] a | 18 |
|
| 5 | could well have [be] a | 6 |
|
| 6 | might well have [be] a | 6 |
|
