| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] a [noun] | 27903 |
|
| 2 | a certain [noun] | 4627 |
|
| 3 | [vb -s] a certain | 272 |
|
| 4 | [vb -s] certain [noun] | 210 |
|
