| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] be [verb] [prep] | 894 |
|
| 2 | they could be [verb] [prep] | 200 |
|
| 3 | they could [not/n't] [verb] [prep] | 124 |
|
| 4 | they could [not/n't] be [verb] | 94 |
|
