| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what [vb past] [prep] | 2590 |
|
| 2 | [vb past] [prep] that | 2097 |
|
| 3 | what [prep] that | 160 |
|
| 4 | what [vb past] that | 108 |
|
