| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [v-ing] [det] | 912 |
|
| 2 | [to-vb] [v-ing] [det] | 252 |
|
| 3 | [to-vb] been [v-ing] | 194 |
|
| 4 | [to-vb] been [det] | 82 |
|
