| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could have been [verb] [prep] [noun sg] | 65 |
|
| 2 | could have been [vb pp] [prep] [noun sg] | 62 |
|
| 3 | [modal v] have been used [prep] [noun sg] | 13 |
|
| 4 | could have been used [prep] [noun] | 7 |
|
| 5 | could have be used [prep] [noun sg] | 5 |
|
| 6 | could have been use [prep] [noun sg] | 5 |
|
| 7 | could [verb] been used [prep] [noun sg] | 5 |
|
| 8 | could have [be] used [prep] [noun sg] | 5 |
|
| 9 | could [vb infin] been used [prep] [noun sg] | 5 |
|
| 10 | could have been used [prep] [noun sg] | 5 |
|
| 11 | could have been used [prep] [noun sg] | 5 |
|
| 12 | could have [been] used [prep] [noun sg] | 5 |
|
