| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | she must have been [v-ing] [prep] | 14 |
|
| 2 | she must have been [v-ing] [prep] | 14 |
|
| 3 | she must have been [v-ing] [prep] | 14 |
|
| 4 | she must have been [v-ing] for | 5 |
|
| 5 | she must have been [v-ing] for | 5 |
|
