| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [been] [prep] several | 13 |
|
| 2 | [verb] been [prep] several | 13 |
|
| 3 | [vb -s] [been] [prep] several | 8 |
|
| 4 | has [been] [prep] several | 7 |
|
