| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | this [noun] could [adv] have be | 10 |
|
| 2 | this [noun sg] could [adv] have be | 10 |
|
| 3 | this could [adv] have be [verb] | 7 |
|
| 4 | this could [adv] have be [vb pp] | 7 |
|
