| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [vb infin] been [adv] [adj] | 24 |
|
| 2 | could [adv] have been [adv] [adj] | 24 |
|
| 3 | could [adv] [verb] been [adv] [adj] | 24 |
|
| 4 | could [adv] have been [adv] [adj] | 24 |
|
| 5 | could [adv] [verb] been more [adj] | 17 |
|
| 6 | could [adv] [verb] been more [adj] | 17 |
|
| 7 | could hardly [verb] been [adv] [adj] | 13 |
|
