| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [been] [v-ing] [prep] | 6838 |
|
| 2 | [v-ing] [prep] this | 3354 |
|
| 3 | [been] [prep] this | 237 |
|
| 4 | [been] [v-ing] this | 209 |
|
