| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] [to-vb] [prep] the [noun] when | 5 |
|
| 2 | used [to-vb] [prep] the [noun] when | 5 |
|
| 3 | [modal v] [to-vb] [prep] the [noun] when | 5 |
|
| 4 | used [to-vb] [prep] the [noun] when | 5 |
|
