| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [pron] [modal v] [vb infin] [prep] | 619 |
|
| 2 | [prep] what [modal v] [verb] [prep] | 149 |
|
| 3 | [prep] what [modal v] [vb infin] [prep] | 148 |
|
