| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [v-ing] [prep] these | 6 |
|
| 2 | has been [v-ing] [prep] these | 6 |
|
| 3 | had been [v-ing] [prep] these | 6 |
|
| 4 | 've been [v-ing] [prep] these | 6 |
|
