| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] to be [v-ing] | 1684 |
|
| 2 | [Wh det] [vb past] to be | 896 |
|
| 3 | [Wh det] [vb past] be [v-ing] | 200 |
|
| 4 | [Wh det] [vb past] to [v-ing] | 7 |
|
