| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] account for | 330 |
|
| 2 | [Wh det] account for | 206 |
|
| 3 | [Wh det] [modal v] account | 40 |
|
| 4 | [Wh det] [modal v] for | 6 |
|
