| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [verb] [Wh det] [modal v] [vb infin] | 170 |
|
| 2 | [modal v] [be] [verb] [Wh det] [modal v] | 86 |
|
| 3 | [modal v] [verb] [Wh det] [modal v] [vb infin] | 47 |
|
| 4 | [modal v] [be] [verb] [modal v] [vb infin] | 30 |
|
