| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [verb] to [be] [v-ing] | 1215 |
|
| 2 | [Wh det] [be] [verb] to [be] | 813 |
|
| 3 | [Wh det] [verb] to [be] [v-ing] | 69 |
|
| 4 | [Wh det] [be] [verb] to [v-ing] | 25 |
|
