| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [vb infin] [verb] [art] certain [noun sg] | 8 |
|
| 2 | [adv] [vb infin] [verb] a certain [noun] | 8 |
|
| 3 | [adv] [vb infin] [to-vb] [art] certain [noun] | 6 |
|
