| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] have [been] [det] | 25 |
|
| 2 | could [adv] [vb infin] [been] [det] | 25 |
|
| 3 | could [adv] [verb] [been] [det] | 25 |
|
| 4 | could [adv] have [been] [det] | 25 |
|
| 5 | could [adv] [verb] been [det] | 25 |
|
| 6 | could [not/n't] [verb] [been] [det] | 19 |
|
| 7 | could not [verb] [been] [det] | 19 |
|
| 8 | could n't [verb] [been] [det] | 12 |
|
| 9 | could [adv] [verb] [been] that | 7 |
|
| 10 | could not [verb] [been] [det] | 7 |
|
| 11 | could [adv] [verb] [been] more | 6 |
|
| 12 | could [adv] [verb] [been] [det] | 6 |
|
