| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it have be [vb pp] at a | 7 |
|
| 2 | it have [be] [vb pp] at a | 7 |
|
| 3 | it have been [vb pp] at a | 7 |
|
| 4 | it have [been] [vb pp] at a | 7 |
|
