| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been a [noun] | 4964 |
|
| 2 | [modal v] have a [noun] | 3998 |
|
| 3 | [modal v] have been a | 1730 |
|
| 4 | [modal v] have been [noun] | 673 |
|
