| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which might [verb] for | 15 |
|
| 2 | [Wh det] might [vb infin] for | 15 |
|
| 3 | [Wh det] might account for | 7 |
|
| 4 | [Wh det] might account for | 7 |
|
