| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] what [noun] [vb past] [pron] [vb infin] | 26 |
|
| 2 | at what [noun] [verb] [pron] [vb infin] | 20 |
|
| 3 | at [pron] [noun] [vb past] [pron] [vb infin] | 10 |
|
| 4 | at what [noun] [vb past] [pron] [verb] | 10 |
|
| 5 | at what [noun] [vb past] [pron] [vb infin] | 9 |
|
| 6 | at [Wh det] [noun] [vb past] [pron] [vb infin] | 9 |
|
