| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] be used [prep] [noun] | 18 |
|
| 2 | could [adv] [be] used [prep] [noun] | 18 |
|
| 3 | could [adv] [be] used [prep] [noun] | 18 |
|
| 4 | could [adv] [be] used [prep] [noun pl] | 10 |
|
| 5 | could [adv] [be] used [prep] [noun sg] | 8 |
|
| 6 | could [adv] [be] used for [noun] | 7 |
|
| 7 | could [adv] [be] used for [noun] | 7 |
|
| 8 | could only [be] used [prep] [noun] | 5 |
|
| 9 | could also [be] used [prep] [noun] | 5 |
|
