| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] have been [adv] a [noun sg] | 35 |
|
| 2 | [modal v] have been [adv] a [noun sg] | 34 |
|
| 3 | [modal v] have been [adv] a [noun sg] | 33 |
|
| 4 | must have been [adv] a [noun sg] | 18 |
|
| 5 | must have been [adv] a [noun sg] | 18 |
|
| 6 | [modal v] have been quite a [noun sg] | 14 |
|
| 7 | [modal v] have been quite a [noun sg] | 14 |
|
| 8 | may have been [adv] a [noun sg] | 5 |
|
| 9 | may have been [adv] a [noun sg] | 5 |
|
