| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [be] [v-ing] | 15842 |
|
| 2 | [be] [v-ing] to | 14229 |
|
| 3 | [modal v] [be] to | 431 |
|
| 4 | [modal v] [v-ing] to | 5 |
|
