| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [be] [verb] be | 73 |
|
| 2 | could [be] [vb pp] be | 71 |
|
| 3 | [vb mod] [be] achieved be | 20 |
|
| 4 | [modal v] [be] achieved be | 20 |
|
| 5 | could [be] achieved be | 5 |
|
| 6 | could [be] achieve be | 5 |
|
| 7 | could [be] achieved be | 5 |
|
| 8 | could [be] achieved [be] | 5 |
|
