| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be [v-ing] to | 1196 |
|
| 2 | [modal v] be [v-ing] to | 603 |
|
| 3 | it [modal v] be [v-ing] | 536 |
|
| 4 | it [modal v] be to | 91 |
|
