| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had [vb pp] to [be] | 569 |
|
| 2 | [vb pp] to [be] [det] | 245 |
|
| 3 | had [vb pp] to [det] | 176 |
|
| 4 | had to [be] [det] | 47 |
|
