| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [verb] been [verb] in | 87 |
|
| 2 | could [verb] been [vb pp] in | 82 |
|
| 3 | could [verb] been used [prep] | 23 |
|
| 4 | could [verb] been used [prep] | 23 |
|
| 5 | [modal v] [verb] been used in | 18 |
|
| 6 | [vb mod] [verb] been used in | 18 |
|
| 7 | could [verb] been used in | 5 |
|
| 8 | could [verb] been used in | 5 |
|
| 9 | could [verb] be used in | 5 |
|
| 10 | could [verb] [be] used in | 5 |
|
| 11 | could [verb] [been] used in | 5 |
|
| 12 | could [verb] been use in | 5 |
|
