| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [be] [verb] [prep] [noun] | 289 |
|
| 2 | [modal v] [adv] [be] use [prep] [noun] | 163 |
|
| 3 | could [adv] [be] use [prep] [noun] | 24 |
|
| 4 | could [adv] [be] use [prep] [noun] | 18 |
|
