| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [be] [v-ing] [noun sg] | 579 |
|
| 2 | could [be] [verb] [noun sg] | 98 |
|
| 3 | could [be] [v-ing] [noun] | 52 |
|
| 4 | could [be] [v-ing] [noun sg] | 27 |
|
