| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could have been a [noun] | 151 |
|
| 2 | could have be a [noun] | 147 |
|
| 3 | could have be a [noun sg] | 147 |
|
| 4 | could have be a [noun] | 128 |
|
| 5 | could have be an [noun] | 23 |
|
| 6 | could have be a lot | 20 |
|
| 7 | could have be a lot | 20 |
|
| 8 | could have be a bit | 7 |
|
| 9 | could have be a bit | 7 |
|
| 10 | could have be a accident | 6 |
|
| 11 | could have be a accident | 6 |
|
