| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] be | 7505 |
|
| 2 | [adv] be [conj] | 2036 |
|
| 3 | could be [conj] | 282 |
|
| 4 | could [adv] [conj] | 219 |
|
