| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is thought to be | 316 |
|
| 2 | was thought to be | 201 |
|
| 3 | are thought to be | 163 |
|
| 4 | were thought to be | 100 |
|
| 5 | be thought to be | 50 |
|
| 6 | been thought to be | 16 |
|
| 7 | 's thought to be | 14 |
|
