| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [noun] | 430262 |
|
| 2 | [prep] [noun] [to-vb] | 46653 |
|
| 3 | a [noun] [to-vb] | 23691 |
|
| 4 | [prep] a [to-vb] | 7 |
|
