| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [noun] | 490659 |
|
| 2 | [v-ing] [prep] [noun] | 76297 |
|
| 3 | [v-ing] a [noun] | 49708 |
|
| 4 | [v-ing] [prep] a | 31510 |
|
