| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] [Wh det] be | 787 |
|
| 2 | when [v-ing] [Wh det] | 40 |
|
| 3 | when [v-ing] be | 28 |
|
| 4 | when [Wh det] be | 8 |
|
