| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could be [verb] | 15987 |
|
| 2 | be [verb] [adv prt] | 15193 |
|
| 3 | could [verb] [adv prt] | 3367 |
|
| 4 | could be [adv prt] | 194 |
|
