| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] has been [v-ing] [prep] | 557 |
|
| 2 | it has been [v-ing] [prep] | 45 |
|
| 3 | [noun] it has been [v-ing] | 19 |
|
| 4 | [noun] it has been [prep] | 16 |
|
