| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [v-ing] [prep] | 40012 |
|
| 2 | [v-ing] [prep] a | 27362 |
|
| 3 | [prep] [v-ing] a | 20914 |
|
| 4 | [prep] [prep] a | 2506 |
|
