| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [adv] [be] a [adj] | 798 |
|
| 2 | could [adv] [be] [art] [adj] | 139 |
|
| 3 | could [adv] [be] [art] [adj] | 139 |
|
| 4 | could [adv] [be] a [adj] | 109 |
|
| 5 | could [adv] [be] a [adj] | 98 |
|
