| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what [pron] [vb past] at [art] [noun] | 39 |
|
| 2 | [pron] [pron] [vb past] at [art] time | 32 |
|
| 3 | what [pron] [vb past] [prep] [art] time | 18 |
|
| 4 | what [pron] [verb] at [art] time | 18 |
|
