| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [Wh det] [pers pn] | 33321 |
|
| 2 | [Wh det] [pers pn] must | 518 |
|
| 3 | [prep] [pers pn] must | 231 |
|
| 4 | [prep] [Wh det] must | 173 |
|
