| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [vb infin] [be] a [adj] | 10 |
|
| 2 | could [adv] have [be] a [adj] | 10 |
|
| 3 | could [adv] [verb] be a [adj] | 10 |
|
| 4 | could [adv] [verb] been a [adj] | 10 |
|
| 5 | could [adv] [verb] [been] a [adj] | 10 |
|
| 6 | could [adv] have [be] a [adj] | 10 |
|
| 7 | could [adv] [verb] [be] a [adj] | 6 |
|
