| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] have been possible for [art] | 5 |
|
| 2 | [adv] have been possible for [art] | 5 |
|
| 3 | [modal v] have been possible for [art] | 5 |
|
| 4 | have been possible for [art] [noun] | 9 |
|
| 5 | have been possible for [art] [noun sg] | 6 |
|
