| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] been [v-ing] | 6932 |
|
| 2 | been [v-ing] [prep] | 6841 |
|
| 3 | [vb past] [v-ing] [prep] | 4396 |
|
| 4 | [vb past] been [prep] | 4108 |
|
