| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been [v-ing] about | 10 |
|
| 2 | 've been [v-ing] about | 8 |
|
| 3 | has been [v-ing] about | 6 |
|
| 4 | have been [v-ing] about | 5 |
|
