| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has [been] [verb] [prep] a | 1853 |
|
| 2 | [Wh pn] has [been] [verb] [prep] | 224 |
|
| 3 | [Wh pn] has [verb] [prep] a | 41 |
|
| 4 | [Wh pn] has [been] [verb] a | 18 |
|
| 5 | [Wh pn] has [been] [prep] a | 12 |
|
