| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] be [verb] [prep] [noun] | 289 |
|
| 2 | could [adv] be [vb pp] [prep] [noun] | 283 |
|
| 3 | [modal v] [adv] be used [prep] [noun] | 163 |
|
| 4 | could [adv] be used [prep] [noun] | 24 |
|
| 5 | could [adv] [be] used [prep] [noun] | 18 |
|
| 6 | could [adv] be used [prep] [noun] | 18 |
|
| 7 | could [adv] be use [prep] [noun] | 18 |
|
