| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] be [v-ing] [adj] | 498 |
|
| 2 | could be [verb] [adj] | 262 |
|
| 3 | could be [v-ing] [adj] | 65 |
|
| 4 | could [be] [v-ing] [adj] | 22 |
|
| 5 | could be [v-ing] [adj] | 22 |
|
| 6 | could [be] [v-ing] [adj] | 22 |
|
