| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [been] [v-ing] | 19916 |
|
| 2 | it [verb] [been] | 11714 |
|
| 3 | it [verb] [v-ing] | 1188 |
|
| 4 | it [been] [v-ing] | 13 |
|
