| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [v-ing] [verb] to | 902 |
|
| 2 | [be] [v-ing] [verb] [is] | 265 |
|
| 3 | [be] [verb] [is] to | 20 |
|
| 4 | [v-ing] [verb] [is] to | 5 |
|
