| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] have been [v-ing] for | 55 |
|
| 2 | it have been [v-ing] for | 50 |
|
| 3 | it [vb mod] have been [v-ing] | 45 |
|
| 4 | it [vb mod] have been for | 14 |
|
