| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has [been] such a | 40 |
|
| 2 | has [ex0] [been] a | 33 |
|
| 3 | [ex0] [been] such a | 11 |
|
| 4 | has [ex0] [been] such | 8 |
|
