| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [pron] [pron] have been | 1110 |
|
| 2 | [pron] [pron] have been [v-ing] | 829 |
|
| 3 | [prep] [pron] have been [v-ing] | 147 |
|
