| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [vb pp] [prep] a single | 25 |
|
| 2 | have been [vb pp] [prep] a single | 25 |
|
| 3 | have been [vb pp] by a single | 8 |
|
| 4 | have been [vb pp] by a single | 8 |
|
| 5 | have been [vb pp] [prep] a single | 7 |
|
| 6 | had been [vb pp] [prep] a single | 7 |
|
| 7 | has been [vb pp] [prep] a single | 5 |
|
