| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] [verb] [be] [prep] | 24 |
|
| 2 | could [not/n't] [be] achieve [prep] | 16 |
|
| 3 | could [verb] [be] achieve [prep] | 11 |
|
| 4 | could [not/n't] [verb] [be] achieve | 10 |
|
| 5 | [not/n't] [verb] [be] achieve [prep] | 10 |
|
