| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] not have be achieved [prep] | 10 |
|
| 2 | [modal v] not have be achieved [prep] | 10 |
|
| 3 | could not have be achieved [prep] | 8 |
|
| 4 | could not have be achieved [prep] | 8 |
|
| 5 | not have be achieved [prep] [art] | 7 |
|
| 6 | not have be achieved [prep] [art] | 7 |
|
