| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [to-vb] [adv] at [art] [noun] | 30 |
|
| 2 | [vb past] [to-vb] [adv] at [art] [noun sg] | 28 |
|
| 3 | [vb past] [to-vb] [adv] at the [noun] | 25 |
|
| 4 | began [to-vb] [adv] at [art] [noun] | 8 |
|
