| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [v-ing] [prep] [noun pl] | 352 |
|
| 2 | [modal v] have been [v-ing] [prep] | 288 |
|
| 3 | [modal v] have been [v-ing] [noun pl] | 30 |
|
| 4 | [modal v] have been [prep] [noun pl] | 20 |
|
