| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] has [not/n't] been | 1110 |
|
| 2 | [noun sg] has been a | 610 |
|
| 3 | has [not/n't] been a | 137 |
|
| 4 | [noun sg] has [not/n't] a | 11 |
|
