| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it have been [v-ing] [prep] | 131 |
|
| 2 | and have been [v-ing] [prep] | 50 |
|
| 3 | and it have been [v-ing] | 22 |
|
| 4 | and it have been [prep] | 14 |
|
