| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to have been [verb] [prep] | 1588 |
|
| 2 | to have been [vb pp] [prep] | 1532 |
|
| 3 | [verb] been used [prep] | 854 |
|
| 4 | have been used [prep] | 854 |
|
| 5 | to have been used [prep] | 34 |
|
| 6 | [to-vb] been used [prep] | 34 |
|
| 7 | to have been use [prep] | 34 |
|
| 8 | to have [be] used [prep] | 34 |
|
| 9 | to have be used [prep] | 34 |
|
| 10 | to have [been] used [prep] | 34 |
|
