| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [Wh det] [vb mod] [verb] to | 101 |
|
| 2 | about [Wh det] [vb mod] [verb] [prep] | 31 |
|
| 3 | about [pron] [vb mod] [verb] to | 22 |
|
| 4 | about [Wh det] [modal v] [verb] to | 19 |
|
