| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [verb] to be [v-ing] | 1215 |
|
| 2 | [Wh pn] be [verb] to be | 302 |
|
| 3 | [Wh pn] [verb] to be [v-ing] | 90 |
|
| 4 | [Wh pn] be [verb] to [v-ing] | 21 |
|
