| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could have been a [noun] | 128 |
|
| 2 | could have [been] a [noun] | 124 |
|
| 3 | could have [been] a [noun sg] | 124 |
|
| 4 | could have [been] a lot | 20 |
|
| 5 | could have [been] a lot | 20 |
|
| 6 | could have [been] a bit | 7 |
|
| 7 | could have [been] a bit | 7 |
|
