| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] to [verb] | 8 |
|
| 2 | it be to [verb] | 8 |
|
| 3 | it [be] to [v-ing] | 6 |
|
| 4 | it [is] to [verb] | 5 |
|
