| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [v-ing] [prep] [pron] | 981 |
|
| 2 | might have been [v-ing] [prep] | 33 |
|
| 3 | might have been [v-ing] [pron] | 18 |
|
| 4 | might have been [prep] [pron] | 12 |
|
