| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [adv] [v-ing] | 9714 |
|
| 2 | [adv] [v-ing] when | 163 |
|
| 3 | [is] [adv] when | 127 |
|
| 4 | [is] [v-ing] when | 54 |
|
