| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] have been a [noun sg] | 795 |
|
| 2 | it [modal v] have been a | 481 |
|
| 3 | it have been a [noun sg] | 371 |
|
| 4 | it [modal v] have a [noun sg] | 84 |
|
| 5 | it [modal v] have been [noun sg] | 69 |
|
