| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | when [indef pn] [vb -s] a [noun] | 28 |
|
| 2 | when [indef pn] [vb -s] a [noun sg] | 27 |
|
| 3 | when one [vb -s] a [noun] | 17 |
|
| 4 | when someone [vb -s] a [noun] | 8 |
|
