| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] could have [been] used | 23 |
|
| 2 | [pron] could have [been] used | 14 |
|
| 3 | [noun sg] could have [been] used | 12 |
|
| 4 | [noun pl] could have [been] used | 10 |
|
| 5 | which could have [been] used | 9 |
|
| 6 | [Wh det] could have [been] used | 9 |
|
| 7 | which could have [been] used | 9 |
|
| 8 | [conj] could have [been] used | 6 |
|
| 9 | [pers pn] could have [been] used | 5 |
|
| 10 | could [adv] have [been] used | 9 |
|
| 11 | could [adv] have [been] used | 8 |
|
| 12 | could have [been] used [prep] | 23 |
|
| 13 | could have [been] used [prep] | 23 |
|
| 14 | could have [been] used [verb] | 13 |
|
| 15 | could have [been] used [to-vb] | 13 |
|
| 16 | could have [been] used as | 7 |
|
| 17 | could have [been] used as | 7 |
|
| 18 | could have [been] used for | 6 |
|
| 19 | could have [been] used for | 6 |
|
| 20 | could have [been] used [adv] | 6 |
|
| 21 | could have [been] used [adv] | 5 |
|
| 22 | could have [been] used in | 5 |
|
| 23 | could have [been] used in | 5 |
|
