| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [prep] a [unc] [no cls] | 146 |
|
| 2 | [v-ing] [prep] [art] [unc] [no cls] | 44 |
|
| 3 | [v-ing] [prep] a [unc] [unc] | 17 |
|
