| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] be [adv] [verb] | 100 |
|
| 2 | they could [not/n't] be [verb] | 94 |
|
| 3 | they could [not/n't] [adv] [verb] | 81 |
|
| 4 | they could be [adv] [verb] | 26 |
|
| 5 | they could [not/n't] be [adv] | 16 |
|
