| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [been] [vb pp] [prep] a | 498 |
|
| 2 | have [been] [vb pp] [prep] a | 498 |
|
| 3 | [verb] [been] [vb pp] at a | 131 |
|
| 4 | have [been] [vb pp] at a | 131 |
|
| 5 | have [been] [vb pp] at [art] | 61 |
|
| 6 | have [been] [verb] at a | 17 |
|
| 7 | have [be] [vb pp] at a | 15 |
|
| 8 | have [been] [vb pp] at a | 15 |
|
| 9 | [vb infin] [been] [vb pp] at a | 15 |
|
