| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could have be [verb] [adv] | 97 |
|
| 2 | could have be [vb pp] [adv] | 92 |
|
| 3 | [modal v] have be used [adv] | 15 |
|
| 4 | could have be used [adv] | 6 |
|
| 5 | could have [be] used [adv] | 5 |
|
| 6 | could have be use [adv] | 5 |
|
| 7 | could [verb] be used [adv] | 5 |
|
