| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] [vb infin] be [prep] | 24 |
|
| 2 | could [not/n't] [vb infin] be [prep] | 24 |
|
| 3 | [modal v] [not/n't] [vb infin] be for | 8 |
|
| 4 | could [adv] [vb infin] be for | 7 |
|
| 5 | could [not/n't] [verb] be for | 6 |
|
| 6 | could [not/n't] [vb infin] [be] for | 6 |
|
| 7 | could [not/n't] [vb infin] be for | 6 |
|
