| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [adv] a [noun] | 13845 |
|
| 2 | could be a [noun] | 614 |
|
| 3 | could be [adv] a | 48 |
|
| 4 | could be [adv] [noun] | 18 |
|
