| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] may have been [v-ing] [pron] | 6 |
|
| 2 | [pers pn] may have been [v-ing] [pron] | 5 |
|
| 3 | may have been [v-ing] [prep] [pron] | 5 |
|
| 4 | may have been [v-ing] [prep] [pron] | 5 |
|
