| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [adv] [v-ing] | 34956 |
|
| 2 | be [adv] when | 460 |
|
| 3 | be [v-ing] when | 373 |
|
| 4 | [adv] [v-ing] when | 163 |
|
