| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have to be [vb pp] to be | 9 |
|
| 2 | have to [be] [vb pp] to be | 9 |
|
| 3 | have to be [vb pp] to be | 9 |
|
| 4 | have to [be] seen to be | 7 |
|
