| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] be a [noun sg] | 139 |
|
| 2 | [ex0] could be a [noun sg] | 122 |
|
| 3 | [ex0] [adv] be a [noun sg] | 60 |
|
| 4 | [ex0] could [adv] be a | 49 |
|
| 5 | [ex0] could [adv] be [noun sg] | 6 |
|
