| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [verb] to be | 17708 |
|
| 2 | [verb] to be [v-ing] | 5334 |
|
| 3 | [be] [verb] to [v-ing] | 1094 |
|
| 4 | [be] to be [v-ing] | 39 |
|
