| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [v-ing] [prep] [det] | 476 |
|
| 2 | they have been [v-ing] [prep] | 256 |
|
| 3 | they have been [v-ing] [det] | 46 |
|
| 4 | they have been [prep] [det] | 40 |
|
