| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has been [v-ing] [prep] [noun] | 262 |
|
| 2 | it has been [v-ing] [prep] | 45 |
|
| 3 | it has been [prep] [noun] | 40 |
|
| 4 | it has been [v-ing] [noun] | 11 |
|
