| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [modal v] [prep] [be] | 321 |
|
| 2 | be [Wh det] [modal v] [be] | 67 |
|
| 3 | be [modal v] [prep] [be] | 9 |
|
| 4 | be [Wh det] [modal v] [prep] | 8 |
|
