| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | about [to-vb] [prep] [art] [noun] [conj] | 26 |
|
| 2 | [adv] [to-vb] [prep] [art] [noun] when | 15 |
|
| 3 | about [verb] [prep] [art] [noun] when | 10 |
|
| 4 | about [to-vb] [prep] [art] [noun] when | 10 |
|
