| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has been [vb pp] to be | 279 |
|
| 2 | have been [vb pp] to be | 180 |
|
| 3 | have been shown to be | 176 |
|
| 4 | have been found to be | 143 |
|
| 5 | had been [vb pp] to be | 102 |
|
| 6 | have been held to be | 28 |
|
| 7 | have been [vb pp] to be | 24 |
|
| 8 | have been reported to be | 23 |
|
| 9 | having been [vb pp] to be | 17 |
|
| 10 | have been designed to be | 16 |
|
| 11 | have been proved to be | 14 |
|
| 12 | have been considered to be | 12 |
|
| 13 | have been said to be | 12 |
|
| 14 | have been expected to be | 11 |
|
| 15 | have been assumed to be | 11 |
|
| 16 | have been thought to be | 10 |
|
| 17 | have been known to be | 9 |
|
| 18 | have been seen to be | 7 |
|
| 19 | have been proven to be | 5 |
|
| 20 | 'd been [vb pp] to be | 5 |
|
| 21 | have been estimated to be | 5 |
|
| 22 | have been ordered to be | 5 |
|
| 23 | have been trained to be | 5 |
|
