| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what [vb past] [prep] [art] | 836 |
|
| 2 | [to-vb] what [vb past] [prep] | 105 |
|
| 3 | [to-vb] what [vb past] [art] | 19 |
|
| 4 | [to-vb] [vb past] [prep] [art] | 13 |
|
| 5 | [to-vb] what [prep] [art] | 7 |
|
