| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [to-vb] a [noun] | 52798 |
|
| 2 | when a [noun] | 3712 |
|
| 3 | [to-vb] when [noun] | 172 |
|
| 4 | [to-vb] when a | 52 |
|
