| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [be] [vb pp] to be | 1071 |
|
| 2 | [modal v] [be] [vb pp] to [v-ing] | 162 |
|
| 3 | [be] [vb pp] to be [v-ing] | 159 |
|
