| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] what [to-vb] when [art] | 5 |
|
| 2 | what [to-vb] when [art] [noun] | 10 |
|
| 3 | what [to-vb] when [art] [noun sg] | 7 |
|
