| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] to have been [verb] [prep] | 530 |
|
| 2 | [vb pp] to have been [vb pp] [prep] | 515 |
|
| 3 | [verb] to have been used [prep] | 30 |
|
| 4 | [vb pp] to have [been] used [prep] | 17 |
|
| 5 | [vb pp] to have been use [prep] | 17 |
|
| 6 | [vb pp] have been used [prep] | 17 |
|
| 7 | [vb pp] [verb] been used [prep] | 17 |
|
| 8 | [vb pp] [to-vb] been used [prep] | 17 |
|
| 9 | [vb pp] to have be used [prep] | 17 |
|
| 10 | [vb pp] to have [be] used [prep] | 17 |
|
