| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it have been [prep] | 611 |
|
| 2 | [pron] have been for | 216 |
|
| 3 | it have be for | 84 |
|
| 4 | it have [be] for | 84 |
|
| 5 | it have [been] for | 83 |
|
| 6 | it [verb] been for | 83 |
|
