| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has to be [vb pp] to be | 26 |
|
| 2 | has to be [vb pp] to be | 26 |
|
| 3 | has to [be] [vb pp] to be | 26 |
|
| 4 | has to [be] seen to be | 15 |
|
| 5 | has to [be] experienced to be | 5 |
|
