| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] thought to have [be] [vb pp] | 9 |
|
| 2 | it [be] thought to have [been] [vb pp] | 9 |
|
| 3 | it [be] thought to have be [vb pp] | 9 |
|
| 4 | it [be] thought to have been [vb pp] | 9 |
|
