| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could be [vb pp] [adv] [adv] | 196 |
|
| 2 | be [vb pp] [adv] [adv] [to-vb] | 128 |
|
| 3 | could be [vb pp] [adv] [to-vb] | 24 |
|
