| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [pron] have [been] | 1114 |
|
| 2 | [verb] it have [been] | 470 |
|
| 3 | [vb past] it have [be] | 142 |
|
| 4 | [vb past] it [verb] [been] | 142 |
|
