| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | 's [noun sg] [vb mod] [adv] have [been] | 16 |
|
| 2 | 's [noun sg] [modal v] [adv] have been | 16 |
|
| 3 | 's [noun sg] could [adv] have [been] | 5 |
|
| 4 | 's [noun sg] could [adv] have [been] | 5 |
|
