| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [to-vb] at a [noun] | 145 |
|
| 2 | [verb] [to-vb] a certain [noun] | 100 |
|
| 3 | [verb] at a certain [noun] | 28 |
|
| 4 | [to-vb] at a certain [noun] | 7 |
|
| 5 | [verb] [to-vb] at a certain | 6 |
|
