| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [v-ing] to [be] [vb pp] | 957 |
|
| 2 | [modal v] [be] [v-ing] to [be] | 16 |
|
| 3 | [modal v] [be] to [be] [vb pp] | 7 |
|
