| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] it has been [prep] | 73 |
|
| 2 | [conj] has been [v-ing] [prep] | 52 |
|
| 3 | it has been [v-ing] [prep] | 45 |
|
| 4 | [conj] it has been [v-ing] | 36 |
|
