| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [be] [v-ing] at [art] | 185 |
|
| 2 | could [be] [verb] at [art] | 85 |
|
| 3 | could [be] [v-ing] [prep] [art] | 58 |
|
| 4 | could [be] [v-ing] at [art] | 9 |
|
| 5 | could [be] [v-ing] at [art] | 9 |
|
