| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] [prep] a | 27362 |
|
| 2 | for [v-ing] [prep] | 3515 |
|
| 3 | for [v-ing] a | 1711 |
|
| 4 | for [prep] a | 443 |
|
