| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could not have been achieved [prep] | 7 |
|
| 2 | could not have be achieved [prep] | 7 |
|
| 3 | could not have [be] achieved [prep] | 7 |
|
| 4 | could not have [been] achieved [prep] | 7 |
|
| 5 | could not have [be] achieved [prep] | 7 |
|
| 6 | could not have [be] achieved without | 5 |
|
| 7 | could not have [be] achieved without | 5 |
|
