| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] [verb] be [adj -er] [prep] | 8 |
|
| 2 | could [not/n't] have [be] [adj -er] [prep] | 8 |
|
| 3 | could [not/n't] [verb] [be] [adj -er] [prep] | 8 |
|
| 4 | could [not/n't] have [be] [adj -er] [prep] | 8 |
|
| 5 | could [not/n't] [verb] [be] [adj -er] [prep] | 8 |
|
| 6 | could [not/n't] [verb] been [adj -er] [prep] | 8 |
|
| 7 | could [not/n't] [vb infin] [be] [adj -er] [prep] | 8 |
|
| 8 | could [not/n't] [verb] [been] [adj -er] [prep] | 8 |
|
| 9 | could not [verb] [be] [adj -er] [prep] | 5 |
|
