| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has been [v-ing] [prep] [det] | 87 |
|
| 2 | [Wh det] has been [v-ing] [prep] | 81 |
|
| 3 | [Wh det] has been [prep] [det] | 5 |
|
