| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [noun] [noun] when | 420 |
|
| 2 | [noun] [noun] when [pos pn] | 129 |
|
| 3 | a [noun] when [pos pn] | 61 |
|
| 4 | a [noun] [noun] [pos pn] | 49 |
|
